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Final Design Review - Harding University

1. 137 138 Oi usu u 139 RS USUI ie ING eer stesso 139 Desci pO u goeoaasiaeeSpasuaenneasiuenbeccuenceasdlss 140 141 143 TO ji MUN ERI MUS HU DEEP MEE 143 Page 3 Project Overview Status 8 Storage and Dispensing Mechanism It was clear from the construction of previous prototypes during the fall that proper connection between all of the mechanical components would be a major issue One of the most important mechanical connections 1s that between the pill storage bin and the auger casing mechanism Previously the pill storage bin and the auger casing mechanism were designed as separate units This design 15 shown in Figures and 2 This 1 suboptimal design because this design requires the extra work of accurately attaching each pair of these components A preferable design 1s shown in Figure 3 In this design the pill storage bin and the auger casing mechanism are designed as one seamless unit This assures that there are no obstruction to the flow of pills between the pill storage bin and the auger casing mechanism Figure Previous Pill Storage Bin Design Page 5 The Pill Storage Bin Attached Here Figure 2 Previous Casing Design Figure 3 Combined Bin and Casing Page 6 To test the design of the pill storage a
2. _ LL LT TIEN m RX HERES 53dBm with 2Mbps core 8 _ IDD core TX on 10 dBm mA Note 1 Sleep current is current consumed during periods of standby between DTIM beacons The module will awake 2 mS before a DTIM and turn ils receiver and possibly its transmitter if data is available for it 2 100 core is current consumed by the not including the 170 consumption of the SPI 3 Current Consumption values represent Typical Peak currents and the measured current conditions were done with 65 duty cycle modulated signal Wi Fi applications typically operate at less than 65 TX duty cycle TX current is dependent such criteria as transmit power setting and transmit data rate and band width being used R gt current is affected by connection distance TABLE 4 5 RECEIVER AC CHARACTERISTICS RA Max Input Level Power 1Mbps 8 PER Max Input Level Power 2Mbps 8 PER Note 1 Nominal conditions 25C VDD 3 3V 2437 MHz measurements at antenna port TABLE 4 6 TRANSMITTER AC CHARACTERISTICS w 5 n 2412 w Average Pout transmit spectrum mask compliant dBm Average Pout gain step resolution from 5 to 1 dBm Average Pout gain step resolution from 5 to 5dbm Note 1 Nominal conditions 25 VDD 3 3V Flo 2437 MHz 2 Mbps
3. Figure 49 This shows the initial design for the control subsystem done in ultiboard Page 41 Wi Fi Transceiver Module This module has taken some time to prepare for testing It does not have pins that allow it to be inserted directly into a breadboard so a separate circuit board was required to be designed and printed Here 1 the first design that was made in ultiboard Figure 50 design for the Wi Fi Transceiver The component has finger pins that need to be soldered to the square pads shown in the PCB design After printing the board however it became apparent that 1t 15 nearly 1mpossible to solder the pins to the board by hand Instead the use of solder paste and the reflow oven was needed to solder the component to the board This worked very well and all pins formed a solid connection with the pads however a connection was formed directly between VDD and GND This obviously was a major problem This was probably caused by the traces that ran underneath the component This problem was originally ignored because it was thought that the resist left on the traces would prevent this from happening but the reflow oven burned off all of the resist left on the board The board was redesigned so that any of the traces running under the component would not cause an unwanted connection Page 42 MRF24WBOMA 1148M7C Figure 51 This shows the Wi Fi transceiver component soldered onto the first PCB
4. 2 Force Repeatability Part to Part 6X Typical Dete oper tube Specifications are dered from measurements taken at 1000 grams and are given as one standard positioning deviation mean unless otherwise noted Many other o 1 Max Actuation force can be modified in custom sensors 2 Force Range can be increased custom sensors Interlink Electronics have designed and manufactured sensors with operating force larger than 5OKg www interlinkelectronics com INTERLIN ELECTROM FSR 402 Technotoat P N 3081794 Application Information FSRs are two wire devices with a resistance that depends on applied force Contact Us For specific application needs please contact Interlink Electronics support team An integration guide is also available For a simple force to voltage conversion the FSR device is tied to a measuring resistor in a valtage divider configuration see Figure 3 The output is described by the equation Pt T In the shown configuration the output voltage increases with increasing force and are swapped the output swing will decrease with increasing force The measuring resistor R is chosen to maximize the desired force sensitivity im range and to limit current Depending on the impedance requirements of the ee measuring circuit the voltage divider could be followed by an op amp family of force vs V curves is
5. 5V 100mA SV 45mA 3 875 W For the 3 3V Pi 3 3V 150 0 50 W The total power needed for the device to function at its worst case motors being used at 12V is 40 38 W The power supply can give up to 55 W which is more than what is needed Construction and testing The construction still needed for the power supply is to solder wires that will go to the wall outlet and from each voltage output to the subsystems Each subsystem was tested before being integrated to the power supply kuwa Z L L a wear arcum soo EEX CIEN im TTE Average voltages fc each output Nie as Figure 42 DC Voltage Outputs from Power Supply Page 34 The DC voltage outputs from the power supply shown in Figure 42 are very steady as time elapsed For the 3 3V a voltage average of 3 738V was measured for the 5V a voltage average of 5 469 V was measured and for the 12V a voltage average of 12 60V was measured The power supply was tested individually with each subsystem and with several subsystems at the same time powering all of them successfully ower Supply RFID Rea Figurer 43 Power Supply with Subsystems Figure 43 shows the power supply connected to some of the subsystems the RFID reader the LCD screen the microprocessor the alarm and the real time clock when they were integrated to test their functions Other subsystems that were integrate
6. Mark for Dielectric Withstand W ui to Ground Basic 1500 VAL 2121 Input to uput Reinforced The primary test is not performed S000 VAL on completed assemblies 4242 VIX ut ta Ground Functional 500 Electromagnetic Interference FOG Part 15 Donducied B Class CISPRA 22 and CISPR 11 Londucted Per ENG1000 4 2 level 3 Hicker Per ENG1000 3 3 Hadiated Susceptibil Per ENG1000 4 3 level 3 3 Vm EFT Burst Per ENG1000 4 4 level 3 1 kV Ingen Transient Protection Per ENG1000 4 5 3 Line to Line 1 W Line t0 Ground 2 HF Immunity Per ENS10D0 4 6 level 3 Vm BLP55 34XX AT 264 VAG 0 72 Environmental Specifications PARAMETER COMO ITIOWE DESCRIPTION NCN UNITS Altitude m 1 Non Operati Operating Temperature OCs 70 wi Unit will start up at 0 25 70 20 G but will not meet all published spectications Forced Air Cooling Farced air cooling of 150 LFM at 10 CAM is required for full output power See Model Selection Table Gonvection Cooling When unit is mounted honzontally wah free air convection 40 W See Model Selection Table Coeficient 70 m 15 minute warm up PG 1 s Shock hall sine 11 3 15 G Non operating Hall sina 11 3ms 3 a 4 Vibration Operating Random vibration 5 500 minutes each axis 24 Grms ating Random vibration 5 500 Hz 10 minutes sach axi
7. 60_ Storage Temperature 40 to 65 Standard Matrix Circuit Diagram AK 207 OUTPUT ARRANGEMENT OUTPUT PIN NO SYMBOL EE ACTUATING FORCE 1807 39 GRAMS Page 99 STROKE 2 05 9 5 mm EDE1144 Keypad Encoder 4 x 4 Matrix Keypad Encoder EDE1144 RS 232 Output 1 0 2400 1 9600 Baud 2 Connect to 5V 3 Connect to 5V 4 Digital Ground 5 Row 0 Output 6 1 Output 7 2 Output 8 3 Output 9 18 Beeper Output 17 Data Valid Output 16 Oscillator Conection 15 Oscillator Connection 114 Connect to 5 113 Column 3 Input 112 Column 2 Input 111 Column 1 Input 110 Column 0 Input Functionality amp Feature Set Automatic key repeat after delay Contact debouncing Keybeep provides tactile feedback to operator Hlectrically quiet reduced EMI keypad scanning Serial Parallel outputs available Data Valid output signal for interrupt activation 2400 9600 serial Baud rates Available in 18 DIP or SOIC packages Interfaces to any microcontroller or microprocessor Cost effective for OEM applications The EDE1144 Keypad Encoder IC is designed to interface a matrix type 4 row x 4 column 16 key less keypad to a microcontroller or other host processor one wire serial or four wire parallel interface returns the keypress data and can be used in conjunction with data valid signal for polled interrupt driven appli
8. ADCONG Ox1F02 ADCS 3 min TAD for 10MHz is 3 TCY 300ns ADCON 0 Interrupt upon completion of one sample convert ADCONI Ibits ADON 1 ADC on int main void 10 Initialize ADC PORTE 0 Set all of PORTE to 0 TRISE 0x0000 make these ports set to output int result 0 variable used to hold the initial sensor reading after each motor step int tempResult 0 used to find the difference between result and the most recent sensor reading int pillDropped 20 boolean used to terminate the while loop once a pill has been dropped Page 80 while pillDropped 0 1 I Start sampling SAMP 1 while ADCON 1bits DONE Wait for DONE bit in ADCONI result ADCBUFO Store result stepMotor Steps the motor 7 2 degrees for delay2 0 delay2 lt 1 delay2 enter a for loop that is used to check the sensor for delay 0 delay lt 20000 delay ADCONIbits SAMP I Start sampling SAMP 1 while ADCON bits DONE Wait for DONE bit in ADCONI tempResult 2 result ADCBUFO Find the difference between the initial result and the most recent reading if tempResult 0 tempResult tempResult 1 If the difference is negative change the sign if tempResult 25 hs the difference 1 larger than 25 then a pill was dropped pillDropped 1 j j j j Page 81 while 1 endless loop used to put the processor in a sleep like st
9. An average person will be able to program the device in less than 5 min The device will have a lock to prevent unwanted access to the interior of the device The device will store 90 pills of each medication The device will be able to connect to a WEP WPA and WPA2 secured Wi Fi networks The device will email the caretaker when the patient s pills are not taken within 30 minutes of the alarm initially sounding Page 141 Table 2 Technical Specifications Total Weight 130 0 46 H x 0 38 x 0 38 3 medication lt 5 min 5 _ Intensity ofthe alarm 80 90 dB _ Leer discharge 1 week 8 lok Locked Unlocked 9 Successful dispensing tests Connected Unconnected _ Table 3 Needs Metrics Matrix ime to program a medication E Amount of pills _ fe intensity of the alarm otal Weight Portableandeasytohandle e e 27 3 of medication 4 Alerthepatientwhenadosageisready 5 Remainactiveataltims 6 Month ssupplyof medication 7 Internal components of the deviceonlyaccesibletothecaretaker 8 7 Consitentlyprovidemedication 9 Alertthecaretakerifadosagehasnotbeentaken Device size T Time to alert the caretaker LLLI Time for battery to
10. Mode with Oscillator Running Optional Industrial Temperature Range 40 C to 85 Available in 8 Plastic DIP or SO Underwriters Laboratories UL Recognized NS CONFIGURATIONS 50 150 mils PDIP 300 mils TOP MARK 051307 05130 051307 SO 150 mils 051307 830 150 mils Tape and Reel 051307 051307 A anywhere on the top mark indicates a lead free package An anywhere on the top mark indicates an Industrial temperature range device Page 126 D51307 64 x 8 Serial Real Time Clock ABSOLUTE MAXIMUM RATINGS Voltage Range Any Pin Relative to Ground PORTE TEN ide UN _ 0 5V to 0 Operating Temperature Range Noncondensing Commercial 5 5 TE CNET NUN SN s 0 to 70 Industrial mS 40 C to 85 storage l emperature Range 5 to 125 Soldering Temperature leads 260 C for 10 seconds soldering Temperature surface mount U Refer to the JPC JEDEC J STD 020 Specification Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to fhe device These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificati
11. Q0 14 3 87mmo Introduction Designed in cooperation with Grand Idea Studio www grandideastudio com the Parallax Radio Frequency Identification RFID Card Readers provide a low cost solution to read passive RFID transponder tags up to 4 inches away The RFID Card Readers can be used in a wide variety of hobbyist and commercial applications including access control user identification robotics navigation inventory tracking payment systems car immobilization and manufacturing automation The RFID Card Reader is available in two versions A TTL level serial interface for use with a microcontroller and a USB interface far direct connection to a computer Features Low cost method for reading passive 125 kHz RFID transponder tags Two easy to use versions Serial interface for microcontrollers and USB for direct connection to PC Macintosh or Linux machines Bi color LED for visual indication of status Page 109 RFID Compatibility The Parallax RFID Card Reader works exclusively with the EM Microelectronics EM4100 family of passive read only transponder tags Each transponder tag contains a unique read only identifier one of 2 or 1 099 511 627 776 possible combinations variety of different tag types and styles exist with the most popular made available from Parallax Connections Serial The Parallax RFID Card Reader Serial version easily interfaces to any host microcontroller using only four connections
12. VCC ENABLE SOUT GND Pin Name System power 5V DC input Serial output to host TTL level interface 2400 bps 8 data bits no parity SOUT ah stop bit G System ground Connect to power supply s ground GND terminal EN ABLE Module enable pin Active LOW digital input Bring this pin LOW to enable the RFID reader and activate the antenna Note Type Input Output P Power G Ground Use the following example circuit for connecting the Parallax RFID Card Reader Page 110 Usage visual indication of the state of the RFID Card Reader is given with the on board LED When the module is successfully powered up and is in an idle state the LED will be GREEN When the module is in an active state searching for or communicating with a valid tag the LED will be RED The RFID Card Reader Serial version is activated via the ENABLE pin on the module s 4 pin header When the RFID Card Reader is powered and ENABLE is pulled LOW the module will enter the active state When ENABLE is pulled HIGH or left unconnected the module will enter the idle state The RFID Card Reader USB version is activated via the DTR line of the USB Virtual COM port When the DTR line is set HIGH the module will enter the active state When the DTR line is set LOW the module will enter the idle state The face of the RFID tag should be held parallel to the front or back face of the antenna where the maj
13. been made for this It receives four signals for controlling the motors an enable signal from the demultiplexer 5 V 12 V and GND The inputs for power ground and the motor signals all have an extra hole so that these can be output from each chip to the next This will reduce the amount of wires needed for the motors Page 46 Enable TS 2 Motor Inputs Motor Outputs GND lt A GND Enable Figure 56 This shows one of the SN754410NE motor driver chips Each motor will have one of these chips Some testing was done to find the relationship between the amount of voltage used to power the motors and the amount of maximum amount of torque that the motors could supply To test this the voltage used to power the motors was ranged from 5 to 12 V A weight was hung from the shaft of the motor using string and more weights were added until the motor stopped turning The torque was then calculated and recorded This data can be seen in the graph on the next page Page 47 Motor Torque with Varying Voltage y 0 6506x 0 5949 0 976 iili E o 8 9 Voltage V Figure 57 This shows the graphical representation of torque vs voltage for the motors Before doing this experiment the amount of voltage being used to power the motors was 5 V and there was very rarely a problem with the motor not having enough torque Now that 12 V 15 going to be used the amount of tor
14. input inputCount 1 40 inputCount inputCount 1 f this checks to see if the enter button was pressed this functionality will be different ffin the final design but for now it just clears the screen and prints the entered character back out to the screen to make sure that it was saved correctly else 17 7 int 1 clearLCD printString input inputCount for i 0 i lt inputCount i I input 40 inputCount 0 this is if any of the other keys were pressed it just prints out the appropriate character else I printCharacter keys repeat num char 21 temp 0 keys repeat num temp 1 40 strcat input temp inputCount inputCount 1 lastPressed num IFSO0bits INIOIF 0 Clear the INTO interrupt flag else dithe CPU will keep vectoring back to the Page 107 Appendix RFID Reader Page 108 Web Site www parallax com Office 815 524 3333 4 4 z Forums forums parallax com Fax 818 624 8003 r1 Sales sales parallax com Sales 888 512 1024 Technical supportigiparallax com Tech Support 838 907 8287 RFID Card Reader Serial 28140 RFID Card Reader USB 28340 245 62 2mm 2 457 62 2 l 2 48 545mm 2458 B45mm 34 L E i ur Cd m m zi m m 0 147 3 6mm
15. 7 ac I p p I rms 010 010 I dc 88 7 nA Freq Figure 44 Batteries Schematic Figure 44 shows the battery schematic in Multisim Figure 45 shows the batteries circuit schematic with the components and the output for each regulator 5V and 3 3V They both show a steady signal through time Page 36 NATIONAL INSTRUMENTS Figure 45 Batteries Circuit Output Voltages Again power calculations were recalculated for the battery powered components The components are taken into account to operate at their maximum nine pills for seven days for three times a day The components that most need power during this time are e Alarm 3beeps 200ms 0 6 30min 36 s 250mA 150 m min e Sensor 1min 8074 60 min Motors 300mA 10motors 2700 min 1 motor e RFID 100mA 1min 1007124 min E Alarm Sensors Motors RFID LAr 3330 min 60min 1000m 0 05554 h 3 times 0 05554 hr 7days 1 166A h Page 37 Battery Indicator Initial Design The initial design for the battery indicator was to have the microprocessor read the voltages of the batteries and indicate 1f the batteries were low Since the batteries will only be used in case of a power outage the batteries could be drained by just checking if there 15 enough voltage without being used New Design The ba
16. MRF24WBOMA MRF24WBOMB 1 0 DEVICES OVERVIEW MRF24 WBUMA and MRF24W60MB are low power 2 4 GHz IEEE Std 502 11 compliant surface mount modules with all associated RF components crystal oscillator bypass and bias passives with integrated MAC baseband RF and power amplifier and built in hardware support for AES and TKIP WEP WPA secunty The integrated module design frees the designer fram RF and antenna design tasks and regulatory compliance testing ultimately providing quicker time to market The MRF24VVBOMA module is approved for use with the integrated PCB meander antenna The MRF24WBDMB comes with an ultra miniature coaxial connector U FL and is approved for use with a list of pre certified antennas See Section 2 8 External Antenna for specific recommendations The MRF24WB MA MRF24VV BOMB modules designed to be used with Microchips TCP IP software stack The software stack has an integrated driver that implements the API that is used in the modules for command and control and for management and data packet traffic The Microchip TCP IP software stack is available in the Microchip Applicaton Libraries download including example applications and source code from the Microchip web site htip wvww microchip com wireless The combination of the module and a PIC running the TCP IP stack results in support for IEEE Standard 002 11 and IP services This allows the immediate im
17. PORTE to 0 IRISD make these ports set to output INIx IO Init initLCD while 1 ffinfinite loop to make the processor stay idle while Waiting for interrupts return 0 Function INTx IO Init sets up the INTO pin y void INIx IO Init void I INTCON2 0 0001 5etup INT1 INT2 INT3 amp INT4 pina interupt f on falling edge and set up INTO pin to interupt f on rising edge INTCON1 0 0000 IFSO0bita INTOIF 0 Reaet INTO interrupt flag TECObits INTOIE 1 Enable INTO interrupt _INTOInterrupt is the INTO interrupt service routine 158 Ihe routine must have global scope in order to be an ISE Ihe name is chosen from the device linker script zr 7 void _ attribute interrupt INIOInterrupt void I short int a 1 00 short int b PORIDbits RDl short int c PORIDbits RD 2 short int d PFORIDbits RD3 this finds the decimal number of the key pushed int num 6 4 2 d 106 this determines if the most recent key press matches the previous one if num lastPressed repeat repeat 1 if keys repeat num 0 repeat 0 else elae repeat 0 fithis is for backspace it goes back and erases the character in the process if num 3 inputCount 0 goBack printCharacter 7
18. Program 29 o 245 _ so 7 ss 7 Wi Fi Setup Program Program User Interface 124 o us M o ze _ s M monere Sis _ 14 Wi Fi Testing uo o v sz System Testing 320 9 43 Spring Pert Chart Legend 52 m C Alarm Testing Mechanical Construction 1 9 30 s o ens X Electrical Construction a 131 o s Stat Sik Finish g3 w Product Readiness Reiview 4n2 426 _ Page 65 After looking at the scheduling made from last semester some revisions needed to be made Our group has for the most part stayed on schedule and completed task on time but it became apparent that some of the tasks needed some iteration before being finalize For example the bin and auger casing construction has not been completed because the design for this needs to be slightly adjusted to make sure that our group will meet all of the requirements Once the design 15 completely finished then it will be a simple matter of printing it out repeatedly on the 3D printer This has also caused the slide construction to be pushed back slightly because its dimensions relies on the bin design The power supply and back up battery circuits have all been printed and some have been integrated to make sure that they will meet the device s power requirements of the programmi
19. Quartz Crystal The internal oscillator circuitry is designed for operation with a crystal having a specified load capacitance of 12 5pF X1 is the input to the oscillator and can optionally be connected to an external 32 68kHz oscillator The output of the internal oscillator X2 is floated if an external oscillator is connected to X1 Note For more information on crystal selection and crystal layout considerations refer to Application Note 58 Crystal Considerations with Dallas Real Time Clocks Backup Supply Input for Any Standard 3V Lithium Cell or Other Energy Source Battery voltage must be held between the minimum and maximum limits proper operation Diodes in series between the battery and the Vegart pin may prevent proper operation If a backup supply is not required must be grounded The nominal power fail trip point Ver voltage at which access to the RTC and user RAM is denied is set by the internal circuitry as 1 25 x Vaat nominal lithium battery with 48mAh or greater will back up the 051307 for more than 10 years in the absence of power at 25 UL recognized to ensure against reverse charging current when used with a lithium e Go to www maxim ic com qa info ul Serial Data Input Output SDA is the data input output for the serial interface The SDA pin is open drain and requires an external pullup resistor The pullup voltage can be up to 5 5V regardless of the voltage on
20. Serial Clock Input SCL is the clock input for the interface and is used to synchronize data movement on the serial interface The pullup voltage can be up to 5 5V regardless of the voltage on Ver Square Wave Output Driver When enabled the SQWE bit set to 1 the SQW OUT outputs one of four square wave frequencies 1Hz 4kHz 8kHz 32kHz The SQW OUT SQW OUT pin is open drain and requires an external pullup resistor SQW OUT operates with either Vec Vear applied The pullup voltage can be up to 5 5V regardless of the voltage on Voc If not used this pin can be left floating Primary Power Supply When voltage is applied within normal limits the device is fully accessible and data be written and read When a backup supply is connected to the device and Ver is below read and writes are inhibited However the timekeeping function continues unaffected by the lower input voltage DETAILED DESCRIPTION The 051307 is a low power clock calendar with 56 bytes of battery backed SRAM The clock calendar provides seconds minutes hours day date month and year information The date at the end of the month is automatically adjusted for months with fewer than 31 days including corrections for leap year The 051307 operates as a slave device on the bus Access is obtained by implementing a START condition and providing a device identification code followed by a register address Subsequent registers can be acces
21. caretaker will organize pills into the device and then set it up to dispense a certain amount of pills at specified times The customer needs shown below give a very general overview of the requirements that will be defined in more detail in the technical specifications section e device needs to consistently dispense the amount of pills entered by the caretaker at the time entered by the caretaker It needs to be completely reliable to ensure the safety of the patient The device needs to service a large variety of pills If there are many types of pills that are not serviceable by the device then the device will not appeal to a large percentage of its target market device needs to be light enough for an average person to carry easily The device needs to be portable and easy to handle It needs to fit comfortably on an average kitchen counter top which has 0 46 m 18 in of space between the counter top and upper cabinets 4 e device needs to remain active at all times Since the device will serve a critical application the device needs to remain in operation in the event of a power failure e The device needs to alert the patient when a dosage is ready It needs to use an alarm instead of more technically advanced methods due to the inferior technical knowledge of the patient The device needs to be easy for the average person to set up This means that it needs to be easy for the average person to insert pil
22. discharge Page 142 Deliverables e Pills dispenser device Systems capability specifications e Detailed schematic and final report on device functionality User manual Parts manual and corresponding budget Testing Plan The general testing procedure for the efficacy of the dispensing mechanism of the device will be carried out as follows e Pills will be inserted into the device For the purpose of this test we will not limit ourselves to actual pills we will allow for other forms of solid orally ingested tablets and capsules such as mints or candies The device will be programmed to dispense the pills at a set time The pills will then have to be dispensed within five minutes of the set times e success criterion described in the following paragraph will be determined visual observation by one of the team members The success of the test is dependent on two factors First the operation will be counted as being on time if the pills are dispensed within five minutes of the programmed time Second the operation must result 1n the amount and type of pills being dispensed as programmed by the caretaker If both of these requirements are successfully met then the result of the test 1s successful Otherwise the test 1s not successful 40 tests will be performed which will fall into one of four categories Each category tests pills that fall within a certain range of masses The categories are 10 mg
23. of the bin future models will be designed to sit lower in the device Page 19 Figure 26 Pills successfully dispensed by the device Figure 27 Successful mating of the gears A few more additional design changes were made after the completion of the second pill storage and dispensing mechanism First more measures were taken to alleviate the problem of pill bridging that was discussed earlier These changes are displayed in Figure 28 Page 20 Connection Angle Change From Angled to Vertical 3ack of Casing Figure 28 New Measures to Prevent Bridging The connection angle was increased again to 809 The main problem with increasing this connection angle in previous designs is that it would result in increasing the size of the back of the casing Increasing the size of the back of the casing would result in pills resting on the back of the casing This problem is shown in Figure 29 This problem can be solved by lowering the point where the back of the casing changes being from angled to vertical Pills had the potential to rest on the back of the casing Figure 29 The flaw in previous connection designs Page 21 new auger casing mechanism was designed to alleviate the bridging problem discussed previously This design is shown in Figure 30 This design works by greatly decreasing distance between the minor and major diameters This means that none of the pills will try to rotate
24. pills on the far right in the photograph These pills bridged in the device across the slope that connects the pill storage bin to the auger casing mechanism This slope 1 labeled in Figure 11 A photograph of the bridging effect is shown in Figure 12 This bridging only occurred once and was addressed with design changes described later in the report Figure 10 Pills successfully dispensed by the device Page 11 Figure 11 Slope between the bin and the casing Pills Rest on Connection Walls Figure 12 Picture of the Pill Bridging Page 12 There was one type of pill that was not successfully dispensed by the device This pill 1 shown in Figure 13 This pill type caused the device to jam This pill type is unique because it 1s a disc with a diameter smaller than the disc shaped pill that was successfully dispensed by the device The dynamics are slightly different for disc shaped pills than for capsular pills because in capsular pills the small dimension 1 biaxial while in the disc shaped pills the small dimension 1 uniaxial There are some design changes to the auger that are intended to alleviate the problem that these disc shaped pills encountered These changes are described later in this section of the report Figure 13 Pill unsuccessfully dispensed by the device Even though this prototype ran successfully the mate between the auger gear and the motor gear was not sufficiently accurate The motor shaft and auge
25. shown on the graph below for standard FSR a voltage divider configuration with various resistors V of 51 was Korea Sales Phone 82 10 used for these examples Figure 3 F wa V for Part 402 L1 www interlinkelectronics com page INTERLI 2 FSR 402 P N 3081794 Mechanical Data REAR CONDUCTOR R amp 354 0 25 SPACER S ACTIVE AREA FSR LAYER y 9 14 0 25 M 38 10 0 25 RL27 0 25 154 0 25 0 00 PRINTED DIELECTRIC 2n ni ni JL r Interlink Electronics Sensor Technologies www interlinkelectronics com Page 122 Appendix H Motor Page 123 Motor No 417 11 48 02 FULL STEP ANGLE MOTOR FRAME SIZE BODY LENGIH RATED CLRRENT PHASE RESISTANCE PHASE INDUCTANCE PH ROTOR INERTIA BEARING TYPE NOMINAL HOLDING TORQUE 2 PHASE 210 AMBIENT OPERATING TEMPERATURE AMBIENT OPERATING HUMIDITY non condensing LEAD WIRES DIELECTRIC STRENGTH LEAD WIRE CONNECTION A RED WHIIE C BLUE B GREEN B D YELLOW D BLACK 0 9 NEMA Size 17 1 1 Maximum 0 3Amps 48 10 10 16 46mH 20 0 0707 2 10 78 oz in 20 C to 50 C 6599 6 24 AWG PVC 500 124 Appendix I Real Time Clock Page 125 MM AKIMA
26. soldered onto a PCB with a header for each pin Programming has been done using ICSP In Circuit Serial Programming using the MP Lab equipment a TI x 9 9 3444444444 wu 7 1111121324 PROS AREEN 1111111 522222555555 L lulu u wait uu w S Ph in Snes eee 1 TRR 1 x kR 64 Pin Socket eee eee eee ee s 23555555525 3555355555 s a 5 k w a Figure 47 This shows the socket with the breadboard and a few components connected Page 39 Currently all of programming done has been for each component individually keypad has been programmed to output to the LCD as required A program has also been written to receive data from the RFID reader using the UART module built into the processor Once a card 1s scanned the processor outputs a confirmation message to the LCD screen A program has been written for the most recent prototype that will turn a single motor and poll the A D reading from the sensor until a pill drop 15 detected The motor controller circu
27. that had the problems with the unwanted connections The PCB design for the transceiver was adjusted so that there were no unwanted connections due to traces running under the component The traces were also increased in size to make sure that all of the connections were good Figure 52 This shows the second design for the Wi Fi transceiver circuit Page 43 dE IE E E E E s E Figure 53 This shows the Wi Fi transceiver component soldered onto the new PCB This time all of the connections were correctly made and the rest of the components were soldered into place At this point there still has not been any programming done for this component Unfortunately none of the groups in the past have used this component before so there 15 no documentation from past students for this component The TCP IP libraries have been downloaded and installed Unfortunately this 1s a very large file with many header and c files Also all of the demos included with this library are intended to be used with one of Microchip s pre built development boards of this code will have to be sorted through to get the functionality required for the device and a hardware profile needs to be created that matches the processor being used instead of what 1s used with the pre built development boards Real Time Clock The code necessary for programming a time and retrieving the time from the real time clock has been comple
28. the top We will connect the device to a WEP WPA and WPA2 secured Wi Fi network five times each If the device successfully connects to the Wi Fi network five times consecutively for each type it has passed this requirement To determine if the device successfully emails the address given by the caretaker when pills are not taken we will purposefully allow the alarm time to run out 10 times after dispensing pills If an email 1s sent for all 10 tests consecutively this requirement has been met For normal operation the time that the device would wait before sending an email will be 30 minutes however for the purpose of this test that time will be reduced to 1 minute Page 144
29. upon each Keypress The following sequence is initiated upon each keypress and is repeated if the key is held Keypress is detected One scan cycle is performed Parallel Outputs D3 D0 are latched with the appropriate value Data Valid signal is activated pulled low Beeper TAA square wave is activated for 45m5 Serial is transmitted This entire cycle takes 50m5 regardless of Baud rate selected If a key is held longer than the autorepeat delay of 660 m5 the cycle is repeated again at a rate of 5 times per second The following timing diagram illustrates the above sequence mi l me I m Keynress Once a key is pressed any additional closures bounce of that contact or of other contacts are ignored for 5015 during which several signals are output by the EDE1144 First the parallel outputs 00 03 Pins 6 9 are latched with the appropriate keypress value One microsecond later the Data Valid Output Pin 17 goes low indicating that there is valid data on the parallel output pins Following this the Beeper Output Pin 18 pulse stream is generated for 45m5 providing auditory confirmation to the keypad operator that a has been pressed Finally the RS 232 Output Pin 1 transmits the Keypress data at the Baud rate selected by the Baud rate input select Pin 2 After this a variable determined by Baud rate chosen delay period is waited to make the entir
30. with the auger Instead they will ride on top of the auger shaft This 1s the phenomenon that caused the larger disc shaped pills to be successfully dispensed by the first prototype and 1 shown in Figure 31 Minor Diameter Figure 30 Auger design to prevent jamming in disc shaped pills Figure 31 Pills riding on top of the auger shaft This design will be tested to see if 1t works with capsular pills If does then all of the smaller pill storage and dispensing mechanisms will switch to this design If not then three different types of pill storage and dispensing mechanisms will need to implemented in the final build Page 22 Device Housing Due to the difficulty with cutting straight edges on bulky pieces of Plexiglas with a band saw it was deemed necessary to have the Plexiglas cut by a glass cutting company It only cost ten dollars to cut the six panels that make up the device housing Holes were drilled in each of the six panels using a mill as a drill press so that metal bracings and bolts could be used to fasten the panels as illustrated 1n Figure 31 The bracings were strategically placed so that they would not interfere with the placement of the dispensing mechanisms while maintaining their function of adding structural strength Figure 31 Isometric Image of Device and Dimensions The designed placement of the LCD screen and keypad were changed to the front of the device housing because it was
31. 051307 64 x 8 Serial Real Time Clock GENERAL DESCRIP TION The 051307 serial real time clock RTC is a low power binary coded decimal BCD clock calendar plus 56 bytes of NV SRAM Address and data are transferred serially through an C bidirectional bus The clock calendar provides seconds minutes hours day date month and year information The end o the month date is automatically adjusted for months with fewer than 31 days including corrections for leap year The clock operates in either the 24 hour or 12 hour format with AM PM indicator The 051307 has a built in power sense circuit that detects power failures and automatically switches to the backup supply Timekeeping operation continues while the part operates from the backup supply TYPICAL OPERATING CIRCUIT ORDERING INFORMATION TEMP RANGE 051307 0 C to 70 051307 40 C to 65 C 0513077 0 C to 70 D313077N 40 to 55 0513077 8 0 C to 70 C D31307 N T amp R 40 to 55 Denoies a leaddree haHS compliant package FERES Real Time Clock RTC Counts Seconds Minutes Hours Date of the Month Month Day of the week and Year with Leap Y ear Compensation Valid Up to 2100 4546 Byte Battery Backed General Purpose RAM with Unlimited Writes Serial Interface Programmable Square Wave Output Signal Automatic Power Fail Detect and Switch Circuitry Consumes Less than 500nA in Battery Backup
32. 5 00 x 1 23 76 2mm x 127 0mm x 31 2mm Weight 0 51 Ib 0 23 kg Mechanical Drawing Triple Output Models um i ETET Gao Met an e oc ma a C CONMECTCR iraz TARLE PIN dt BATE ng nee EMEN BAF ET GROUMD cbe AREA CONMECTIDN MINT U F aad LS apne ees END VIEW i l NOTE This ls cutine drawing only The detalled locaton af components Is mot shown NUCLEAR AMD MEDICAL APPLICATIONS products are mot designed Intended for use In or for use as critical components In life support systems equipment used In hazardous environments or nuciear control systems without the express written consent of the respective dhisional president of Power One Inc TECHNICAL REVISIONS The appearance of products including safety agency certifications pict date manufactured Specifications are subject to change Wout notice red on labels may change depending on the Page 136 Requirements Specification 8 Page 137 Overview The number of people over 65 1s increasing due to the aging of the Baby Boomers the generation of people born after World War Two One of the greatest demands of this generation is medicine People over the age of 65 buy 30 percent of all prescription drugs and 40 percent of all over the cou
33. 7 a DAL S CER 0 ET JAMO BREADBOA D Encoder Figure 66 This shows the keypad connected to the encoder The wires going to the left connect to the processor Page 55 RFID Reader The reader has been put into a breadboard and connected to the processor It sends data serially through its one output line at 2400 bps 8 bits 1 stop bit and no parity Using the processors built in UART Universal Asynchronous Receiver and Transmitter I was able to complete the code required to generate an interrupt when a card 1 read and data 15 sent to the processor Currently it does not check the data to make sure that what was sent matches the card ID but this will hopefully be resolved soon As of now when a card is read the processor prints out a confirmation message to the LCD screen and disables the reader The reader s features and the written code that goes with it can be seen in Appendix Wid Paraj as hth Figure 67 This shows the RFID Reader and one of the RFID chips that came with it Page 56 GUI The following pages contain screen shots of the initial user interface that will be used by the caretaker to set up the device They will first log in with a username and password Then they will be able to change medication information the time in the real time clock and add or remove emails to be notified when something goes wrong Firefox Harding U
34. Diagram OSC1 OSC2 Instruction 7 register IR Instruction CRM to RS decoder RAW face SEG1 SEG40 DB4 to u DET DBO to eutput 7 083 Character generator generator RAM ROM CGROM GND 64 bytes 9 920 bits r5 UT Parallal serial converter and attribute circuit A 1 V2 V3 V4 V5 Page 95 HD44780U Pin Functions No of Signal Lines RS 1 RAV 1 E DB4 to DB i to DB3 4 CL1 1 CL 1 1 D 1 to COM16 16 to SEG40 40 V1 to V5 5 V GND 2 OSC1 OSC2 2 Device Interfaced with MPU MPU MPU MPU MPU Extension driver Extension driver Extension driver Extension driver LCD LCD Power supply Power supply Oscillation resistor clock Function selects registers 0 Instruction register for write Busy flag address counter for read 1 Data register for write and read Selects read or write 0 Write 1 Read Starts data read write Four high order bidirectional tristate data bus pins Used for data transfer and receive between the MPU and the HD44780U DB can be used as a busy flag Four low order bidirectional tristate data bus pins Used for data transfer and receive between the MPU and the HD44780U These pins are not used during 4 bit operation Clock to latch senal data D sent to the exten
35. HARDING UNIVERSITY Final Design Review Andrew Combs Emilia Faraj Ethan Lilly Jeff Wood March 2 2012 Page 1 Table of Contents Project Overview and SEAL US S 9 n 4 Storage and Dispensing Mechantism 5 Davie HOUSE u u mcm 22 POWT iU ojo TET E 33 Gre guide y IE T 39 53 lo Pili 62 Organization and Managemetnt 63 201 64 Ol 5 4 17 1 u 65 66 Duo LM S 67 jJ lO RR 71 pp hj OB E E 73 74 Wislii rlia sceoiver Mo l le ll deua en Ml pet 83 92 98 ROC ES ecards 108 s 115 118 o HE 123 Real ve 125 QUNM 130 55606 uyu u uuu EE ks
36. P Power input Input O Output NC Do Not Connect WE MK NE m NN O ovo EK NN S 19 _ S 3 Note 1 Signals of I Constant must either constantly driven by the host or have a pull up or pull down in case the host is likely to tri state the signal during power down modes The constant drive is used to ensure defined operation of the part and to minimize leakage current during low power modes 2 WP is used as write protect for the intemal module Flash For production use this pin should be pulled low This pin can be controlled by the host microcontroller to enable in field Flash updates Page 87 MRF24WBOMA MRF24WBOMB 2 0 CIRCUIT DESCRIPTION MRF24WBOMA MRF24WBOMB interfaces to Microchip PIC18 PIC24 dsPIC33 and PIC32 microprocessors wih a minimal of external components through digital only connections This section details use of the module starting with an example host connection as shown in Figure 2 1 2 1 Schematic FIGURE 2 1 MRF24WBOMA MRF24WBO MB EXAMPLE APPLICATION SCHEMATIC Tn JTAG Interfnre tz JTA G yoten Cantrolle Ta Host HrEeracentrzetigr JTAG EM 7 HIBERNATE GHD 2 2 Power On Sequence The internal regulators for the digital and analog core powe
37. PORTE 0 000 Send the command PORTF 0 0004 lcdDelay 0 0000 lcdDelav f clearLCD void goBack S5Set the command to turn on all 4 lines PORTE 0 0010 PORTF 0 0000 5 the command 0 0004 lcdDelav 0 0000 ledDelay f this function is used to convert a given character and print it to the LCD void printCharacter char character int converted character character the command to print the character PORTE converted character 0 0001 5Send the command 0 0005 lcdDelav 0 0001 ledDelay void printString char message int length int index for index D index length index printCharacter message index void printInteger int input EOF int firstI input 10 48 input input 10 int secondI input 10 48 input input 10 int thirdl input 10 48 input input 10 int fourthI input 10 48 char first firsti char second secondi char third thirdI char fourth fourthI printCharacter fourth printCharacter third printCharacter second printCharacter first Appendix D Keypad Page 98 General Specification Contact ratme 20mA 24VDC Contact resistance 200 ohm max Life 1 000 000 cvcles per kev Operating Temperature 20 to
38. STICS NOMINAL CONDITIONS 25C Vpp 3 3V Vis Input high voltage vor Output iow vote 3834 V Output nion vone 24 V Output low level current at oa m Output high level current at VOHMin 154 TABLE 4 2 ABSOLUTE MAXIMUM RATING sU Parameters Nm Storage Temperature 4 2V for 0 5mSec VOD above this level and duration will disable Radio Note 1 Listed Absolute Maximum Ratings are not meant for functional operation Operation at these levels is not guaranteed and may reduce the operating life of the component TABLE 4 3 RECOMMENDED OPERATING CONDITIONS wm Ambient Temperature Feet Tepe as Degrees Celsius x VoD for FCC and IC 33 3639 volts Note 1 While 3 63 is the maximum operating voltage ihe module will detect an TOTIS ETT condition at 4 2 disable the RF Transmit function after 0 5 ms This is an RF certification requirement pertaining to disabling transmission in unforeseen overvoltage conditions 2 Ambient temperature for industrial part number is minimum 40C to maximum 85C Contact Microchip Sales for industrial temperature parts Page 90 MRF24WBOMA MRF24WBOMB TABLE 4 4 CURRENT CONSUMPTION NOMINAL CONDITIONS 25C 3 3V C fy NN po Hibemate 33V 91 _ 0 Se tare iis
39. all of PORTE to 0 IRISB 0 0000 make these ports set to output PORIFbits RF5 1 aet the enable pin on the RFID reader to HIGH IRISF 0 0000 at all of PORIF to output initLCD initUART initRFID while 1 I wait for input return 0 dithis interrupt is triggered once it begins to recieve data from the RFID reader It currently doesn t do anything with the data to make sure that the data received matches the ID of a card but this will hopefully be fixed in the near future void attribute interrupt U2RXInterrupt void printString card was detected 19 IEClbita U2RXIE 0 disable the interrupt U2MODEbits UARTEN 0 disable the UART Module PORTFbits RF5 1 set the enable pin on the RFID reader to HIGH IFSlbits U2RXIF 0 the interrupt flag to low Page 114 Appendix F Alarm Page 115 Part Number 555 For 60601 1 8 Medical Applications MAUORY T 555 ott 5 199125 _ Wie Pin m d KEY FEATURES Designed to Meet 60601 1 8 NE E 975 Hz Fundamental Frequency 4Harmonic Peaks within 15 dB 1 L to 4 kHz 4 S8dB 10cm Typical 2B amm Three priority sounds low medium 512133 amp high Specifications Voltage Range 5 0 0 5 Vdc Low Priority Signal 2 Beeps t
40. as Sheet 72 x36 Lowes Zinc Corner Brace 4 braces in each screws included Lowes Lock Hinges Nuts Lowes Components PCB www expresspcb com 2 Batteries Walgreens Alarm www digikey com 3 3 V Regulator www digikey com 15 Regulator www digikey com Transformer Encoder www jameco com Power Ne SN754410NE Ics www jameco com Crystal 4 mHz www jameco com 74HC154 IC Computer Wi Fi Module www iicrochip com LCD Screen Keypad Budget Cost Unit 8 54 98 2 67 4 27 2 21 65 00 9 49 11 84 5 2 1 87 19 99 5 41 00 95 58 14 19 1 95 29 0 23 74 12 90 2 90 Units 1 Shipping Cost 1 51 2 80 3 11 Taxes m m Total Cost 60 98 5 58 65 00 10 25 6 70 20 05 22 61 0 59 Date Estimated 12 1 10 8 10 8 12 6 12 6 12 6 10 3 12 6 10 3 12 1 12 5 10 3 1 18 1 27 1 28 1 28 1 28 10 8 10 8 10 8 Page 68 Reader Chips www parallax com Schmart 4 Total 00 0 00 15 89 1 29 O aru 1030 00 0 00 MEM NN VEN Page 69 Budget 2 Cost Unit Shipping Total Date Item Vendor Units Cost Taxes Cost Estimated D a Components 8 95 0 00 0 00 8950 121 am ss 72 x36 Lowes 54 08 4 30 59 37 10 8 1 30 28 s om s
41. atch Dog Timer Enable MCLR reset pin and Global Variables and Functions void INTx IO Init void void attribute interrupt INIOInterrupt void Declare external interrupt ISEs void initIlIimer this two dimensional array will allow me to traverse through the characters when a button is pushed several times in a row char 10 12 I 1 7 4 3 9 E a 0 ji MU ET 3 T 1 1 3 h 10 xt n 0 0 0 ET Y ey 10 Cs ET X0 G AU TET X0 S J 0 s H ET N AU E Q I A0 10 L AD 1 En AD t AD v AD 0 1 UT pi im xD E a 0 AD AD 0 0 N 0 x 10 vD ADU v x AU s X0 117 int buffer 0 int repeat D int inputCount 0 int lastPressed 1 char input 33 Page 105 int main I PORTE 0 5et all of PORTE to 0 IRISE 0 0000 make these ports set to output PORIB 0 all of PORTE to 0 IRISB 0 0000 make these ports set to output PORID 0 5et all of
42. ate return 0 Page 82 Appendix Wi Fi Transceiver Module Page 83 MICROCHIP MRF24WBOMA MRF24WBOMB MRF24W BOMA MRF24W BOMB Data Sheet 2 4 GHz IEEE Std 802 11b Features IEEE Std 802 11 compliant RF Transceiver Senalized unique MAC address Data Rate 1 and 2 Mbps IEEE Std 802 11b g n compatible Small size 21mm x 31mm 36 pin Surface Mount Module Integrated PCB antenna MRF24WBOMA External antenna option MRF24WBOMB with ultra miniature coaxial U FL connector Range up to 400m 1300 ft Easy integration into final product accelerates product development provides quicker time to market Radio regulation certification for United States FCC Canada IC Europe ETSI and Japan ARIE Wi Fi certified WFA ID WFA7150 Designed for use with Microchip microcontroller families PIC18 PIC24 dsPIC 33 and PIC32 with downloadable Microchip TCP IP Stack Operational Single operating voltage 2 7Vv 3 6V 3 3V typical Temperature Range 20 C to 557 C extended commercial Simple four wire SPI interface with interrupt Low current consumption RA mode 85 mA typical TX mode 154 mA 10 dBm typical Sleep 250 pA typical Hibernate lt 0 1 uA typical RF Analog Features ISM Band 2 400 2 484 GHz operation 14 Channels selectable individually or domain restricted 0555 Modulation Data Rate 1000 kbps 91 Typical sensitivity at 1 Mb
43. atts NS Changing Shane of Power Input Specifications Hz Inrush Surge Currant Intarnaly limited Vin 115 VAC Max Power 25 C 18 Are Intarnaly limited Vin 230 Max Power 25 C 36 Hex PARAMETER EDHDITIDHE DESCRIPTION HOM UNITE Output Power With convection cooling 3300 25 WI Model Selection Table 40 Watts With forced air cooling 3300 41 W Sea Model Salaction Table 55 Output DC Adjustzbility lity of Val Va2fVal are nat adjustable 5 1086 Of Nam s Load Transient Vol Vo2 deviation dua to 50 to 100 load change 3 L ala rale of 1 us Turn On Time from AG Time required for output voltage to reach within regulation after initial application 15 Sac of AC input Turn On Delay Time required for output voltage to mse irom 1096 to 0096 20 ms Time M 40 W 115 VAG ms Remote Sense Total compensation for cable losses on 500 mv Remote Sense rs available Tor Vn or Vo3 IX 135 162 m 7E 324 48V 528 554 Short Circuit Protection Fully protected against output short circuit Page 132 BLP55 AC DC Series Data Sheet A 55 Watts power on Frrr Changing Shape af Power Safety Regulatory and EMI Specifications PARAMETER CONDITIONS DEBCRIFTION MAX UNITS Agency Aporova 95 22 2 60950 1 03 E E35 0 1 EC 60952 1
44. be to shrink the dimensions of the pill storage bin or increase the diameter of the casing Since these values are already locked by other design considerations the problem must be solved by increasing the slope of the connection Connection Slope Angle 1 Figure 24 Illustration of the connection between the casing and the bin Page 18 A pill storage and dispensing mechanism intended for larger pills that implemented these design changes was 3d printed and connected to the device housing A picture of this mechanism is shown in Figure 25 Figure 25 Pill storage and dispensing mechanism connected to the device housing This device performed successfully with both of the pills shown in Figure 26 The device dispensed both of these pills one at a time in all tests with no instances of jamming This device is also successful in achieving an improved mate between the auger gear and motor gear The device ran much more smoothly and quietly than the previous prototype This is due to the fact that the auger shaft and motor shaft are parallel and the distance between the two gears 1s correct This allows an accurate mate between the two gears A picture of this phenomenon 1 shown in Figure 27 The only critical flaw in the device 15 that it sits too high in the device housing The lid of the device housing cannot shut properly For this pill storage and dispensing mechanism this will be alleviated by cutting off some of the top
45. cations The EDE1144 provides enhanced keypad features such as contact debouncing and key auto repeat in an easy to use package that will lower software overhead in the host microcontroller and reduce the VO pin requirements from eight to frequently resulting in the use of a less costly host microcontroller in your design In addition the EDE1144 15 electrically quiet Many keypad encoders continually scan the keypad radiating EMI noise from the wires leading to the keypad resulting in trouble during emissions testing amp final product certification amp approval The EDE1144 reduces this problem by monitoring the Keypad with unchanging signals and then scanning only once each time a keypress is detected Page 100 PIN DEFINITIONS Keypad Connection Pins RO Row Data 0 Output Pin R1 Row 1 Data 1 Output Pin 7 Column 0 Input Pin 10 C1 Column 1 Input Pin 11 C2 Column 2 Input Pin Column 3 Input Pin 13 Control amp Data Pins Baur Pim 2 u uuu a asas Do is Hf Clock Pow
46. d and not shown in the picture were the motor controller circuit the sensor in the pill retrieval area and the keypad Battery Backup Design and Progress One of the requirements for the battery 1s that the device should work for at least one week with a backup power system The power calculations can then be multiplied for the device dispensing nine pills three times a day for an entire week Another requirement related to the battery is the device s weight Page 35 Initial Design The initial design of the battery was to have four 9V disposable alkaline batteries with two parallel pairs connected in series supplying power after a power outage Power from the batteries was at 18 so the motors could run with 15V New Design Construction and Testing Since the motors are still the components that require the most power 36 W running at 12 V we do not need 18V to power the motors Data was taken to show the relationship between voltage and torque When the motors are using 9V it is still a good torque and the motors function well Therefore when the device 1 battery powered the motors will be running at 9V This means there will only be two 9V batteries in parallel that still supply all of the power needed V 9 00 V V p p 203 D2 virma 0 V to power supply 9 00 V na002G PAT I 357 Vi 8 87 V Ipp V p p 202 nV 357 V rms OV I dc 357 nA V dc 8 87 V Fregq I 88
47. dioshack com product index jsp productId 2 103667 6 Shigley s Mechanical Engineering Design Ninth Edition Page 416 Page 72 S ndice e p Ap Appendix Microprocessor Page 74 lt MICROCHIP dsPIC30F6010A 6015 High Performance 16 bit Digital Signal Controllers This data sheet summarizes features of this group of dsPIC30F devices and is not intended to be a complete reference source For more information on the CPU peripherals register descriptions and general device functionality reter to the dsPI C30F Family Reference Manual 0570046 For more information on the device instruction set and programming refer to the 16 bit and DSC Programmers Reference Manual 0570157 High Performance Modified RISC CPU Modified Harvard architecture C compiler optimized instruction set architecture with flexible Addressing modes 03 base instructions 24 bit wide instructions 16 bit wide data path 144 Kbytes on chip Flash program space Instruction words Kbytes of on chip data 4 Kbytes of nonvolatile data EEPROM Up to 30 MIPS operation DC to 40 MHz external clock input 4MHz 10 MHz oscillator input with PLL active dx 8 15x 7 37 MHz internal RC with PLL active 4 Bx 16x 44 interrupt sources Five external interrupt sources Eight user selectable priority levels for each interrupt source Four processor trap sources 15 x 16 bit working register array DSP E
48. during the fall semester had trouble dispensing pills with a length of approximately 1 in This was due to problems rotating a long flat pill with a curved surface A larger minor diameter means that the surface of the auger will be less curved relative to the pill Figure 20 Auger with increased minor diameter The second change was done to the casing and is shown in Figure 21 and Figure 22 Additional support was added to the end of the casing The purpose of this support 1s to limit movement of the auger Previously the end of the auger was free to rock upward This rocking 1 undesirable due to the risk of pills wedging underneath the auger A picture of this phenomenon is shown in Figure 23 With this new support that movement will be constrained Page 16 End Support Figure 21 Illustration of the added support at the end of the casing Normal force between auger and overhang Overhang prevents the end of the auger from rocking upward Figure 22 Illustration of the added support with the auger Page 17 Figure 23 Pills jammed underneath the auger The last change was that the slope connecting the bin to the casing was increased This 1 illustrated 1n Figure 24 This change should alleviate the bridging problem encountered during the testing of the prototype The angle of this slope in the prototype was 60 which 1 less than the 70 in the new prototype The only other way to alleviate this problem would
49. e dispensing mechanism She will back up Ethan to make sure he completes his tasks Page 63 Spring 2012 Gantt Chart 9 CUT SSQUIDES d amp l Emensniim E _ Sm luss g og _ BPD SESS eee ees E Ll s 111111111 20059 1055220200 IL ET Las j 1 IK _ Ll lem L l mal a pf 111 L LI J s _ D el el ele L L L L ln u s 7 WE ESE SEE EE su EH sa E sup Page 64 Pert Chart Spring 2012 e Device Housing Construction 1 Auger Casing Construction 1 9 2 Sensor Testing 28 o 215 Motor Testing N e nA System Integration s I Da 14 Power Cicuit 28 pss 7 Battery Testing s Microprocessor Testing uo s a Keypad Testing 19 Su LCD Screen Testing 123 si 6 Dispense Medication En Program 29 215 s e Medication Retrieval Confirmation
50. e process to last precisely 50m5 If a key is held longer that the autorepeat delay of 660m5 the outputs are cleared and this entire process is repeated every 2041115 until the key is released by the operator Page 103 4 Data Valid Interrupt Output Serial Output EDE1144 va 4 MHz a BR 00458 ADI Parallel MSB Figure Two Schematic of Ke ypad Connection Figure Two illustrates a typical connection of a 4x4 keypad to the EDE1144 Note that RO R3 Pins 6 9 are connected to the keypad rows through 330 Ohm resistors They are present to prevent a short circuit during the scan cycle in case more that one key is being held at a time and they can also help to lower radiated emissions from the keypad wires The 4 7K Ohm resistors on the keypad columns pulldowns to prevent the EDE1144 column inputs from floating oscillating Pulldowns should be present on all four column inputs 0 3 regardless of the keypad size or configuration being used Note Power and Ground connections have been omitted from the EDE1144 hookup shown in Figure Two to simplify the illustration They must be connected in actual operation Also when using a 4MHz resonator with internal capacitors the third center pin should be connected to ground PARALLEL DATA To read data from the EDE1144 in a parallel format the host microcontroller will input from the four data
51. ecause the Plexiglas cracked quickly when the mill s feed rate was too rapid It ultimately took two passes to cut completely through the 0 3175 cm 1 8 in thick Plexiglas The door itself was cut using the same process as the doorway Page 25 Figure 34 Pill Retrieval Door from a Front View Device Motor Not Shown Thin strips of Plexiglas were cut with the band saw in order to construct the two tracks The strips were glued together in an L shaped fashion and these two L shaped tracks were glued directly to the device as shown in Figure 35 Page 26 Figure 35 Pill Retrieval Door from a View Inside of the Device Motor Not Shown The eight wheels in Figure 35 were connected to the door in four pairs by metal axles Four small holes were drilled through the door where each axle was inserted The wheels are completely fixed to the axle and door motion occurs through rotation of the axle within the door The stepper motor was bolted to the wall by a motor mount shown in Figure 36 and will be completely constrained The motor mount was constructed from thin strips of Plexiglas and small metal braces being glued together The pinion 1 fixed to the motors shaft and only has rotational freedom Page 27 Bolted Motor Mount Figure 36 Pinion Stepper Motor and Motor Mount Design Change of the Pill Retrieval Area Through testing it was discovered that the force sensors were negatively affected by n
52. ect pills dropping into the tray All of the panels that compose the pill retrieval area are Plexiglas and were cut using a mill The pill retrieval area 1s glued together in accordance with the dimensions shown in Figure 39 The final design of the pill retrieval area has been constructed and integrated into the device displayed in Figure 40 and it operated successfully in tests where worst case scenario vibrations where created within the device Page 29 Figure 39 Dimensions of Pill Retrieval Area Page 30 Doorway Figure 40 Pill Retrieval Tray Suspended within the Device Slide Construction of the slide is underway The colored portions of the slide in Figure 41 have been milled out of Plexiglas The final dimensions of the slide s width and height will be known when the dispensing mechanisms are finalized so slide construction is currently halted until these values are known The slide itself will consist completely of Plexiglas and will be glued together to form its shape The support structure of the slide will consist of Plexiglas and metal braces and is not shown Construction of the support structure is also in progress Page 31 Figure 41 Slide Design and Current Progress Page 32 Power Supply Overview The purpose of the power supply is to receive power from the wall outlet to power the device It will convert the voltage from AC to a lower DC voltage to supply the power needed for the electrical compon
53. ed off that the module can approach It is controlled through HIBERHATE pin high input puts the module into Hibernate When in Hibernate the module only consumes leakage current but does not maintain state Hibernate has to be fully controlled by the MCU and requires the TCP IP stack to restart on an awake The module contains about 7 of intemal bulk capacitance Supplies should be provisioned to supply sufficient charge on release of hibemate for desired start time or sufficient delay must be provided in software after hibernate release and before releasing reset This state provides the best battery for embedded products Entering Hibernate for intervals of less than 30 seconds is not likely to save power Battery expectation can be more than a year for devices operating on AA cells that would be in Hibernate except to wake up every hour for a small data transfer 500 Bytes TABLE 2 1 2 32 SLEEP STATE The Sleep state is a low power dynamic state that automatically implements the 802 11 Power Save feature this mode if enabled the module will enter Power Save mode when all activity is complete The module will wake autonomously to any PIC intervention so it can check DTIM beacons from the Access Point If any traffic is listed as queued for the module then it will awaken and get the data from the Access Point on the next possible opportunity When data is acquired the module will interrupt
54. engineering students one computer engineering student and one electrical engineering student The project s management and design tasks will be distributed among the team into the following responsibilities Andrew Combs Mechanical Engineer Andrew is the team leader of this project He is responsible for making sure that the subsystems are completed and integrated on time He 1s responsible for making sure that all reports and presentations are completed on time He is responsible for the design and construction of the auger casing mechanism Andrew will work with Jeff to make sure all of Jeff s tasks are completed Jeff Wood Mechanical Engineer Jeff is responsible for making the SolidWorks drawings of the design He 1s responsible for the design and construction of the device housing pill storage bins slide and pill retrieval area He will work with Andrew to make sure that all of Andrew s tasks are completed Ethan Lilly Computer Engineer Ethan is responsible for programming the microprocessor and constructing the user interface which includes the LCD screen keypad graphical user interface and the Wi Fi interface Ethan will back up Emilia to make sure she completes her tasks Emilia Faraj Electrical Engineer Emilia is responsible for maintaining the budget She 1s responsible for the electrical designs for the power supply the alarm and the sensors She will work with Andrew in the electromechanical components of th
55. ents One of the requirements stated previously 1 that the power supply should have back up batteries that will keep the device running for at least one week Initial Design The initial design for the power supply was to gather the components the transformer resistors capacitors regulators and build it It had been simulated to work in Multisim to power all of the subsystems as necessary but due to heavier components than anticipated a power supply was purchased to meet the device s weight requirements New Design and Progress The power supply purchased regulates voltage to use 12 V at 0 to 0 5A 5 V at to 2A and 3 3 V at 0 5 to 4A to power the different components the device needs to operate Note that the motors are now operating at 12V as opposed to 15V in the initial design there 1 also only one sensor being used and an additional motor for the door gate See Appendix J These components are the following 10 Stepper Motors 12 VDC at 300 mA Alarm 5V at 250mA e Microprocessor 5V at 29 45 mA Keypad 5 V at5 mA e LCD Screen 5V at 300mA e Force Sensor 5V at 4 5 80mA Wi Fi Transceiver Module 3 3V at 150mA RFID chip at 100mA Power calculations had to be recalculated for each component to make sure the power supply can supply enough power to all of the components P Vel For the 12V P 12V 300mA 10 36 W Page 33 For the 5V 250 5V 300mA 5V
56. er Pins 0501 Pin MERI Ve ON ae HMM MM doi naa IS EW ur Multiplexed Keypad Row 0 Host System Data Input Multiplexed Keypad Row 1 Host System Data Input 1 Multiplexed Keypad Row 2 Host System Data Input 2 Multiplexed Keypad Row 3 Host System Data Input 3 Multiplexed Keypad Column 0 through 330 c resistor Multiplexed Keypad Column 1 through 330 resistor Multiplexed Keypad Column 2 through 330 2 resistor Multiplexed Keypad Column 3 through 330 resistor Baud Rate Selection 0 2400 1 9600 serial Data Output N 8 1 R5232 TTL ICMOS Voltages Data Valid Signal Interrupt Pin 18 Parallel data valid when low Modulated Output Signal Oscillates on keypress or repeat One of 4MHz parallel cut crystal or resonator or a direct clock input Other pin of 4MHz parallel cut crystal or resonator or leave floating if OSC driven with a clock input Connect to 5V DC to V DC Ground Page 101 4 4 Multiplexed Keypad LI EI Serial EDET144 Output Column 2 Ke ad Valid Column Q Beeper 2400 1 9600 Baud Select Input Figure One Connection Block Diagram As illustrated by Figure One the EDE1144 resides between the keypad and host microc
57. errupt on position counter rollover underflow Analog Features 10 bit Analog to Digital Converter ADC with four S H Inputs 1 Msps conversion rate 16 input channels Conversion available during Sleep and Idle Programmable Brown out Reset Page 75 dsPIC30F6010A 6015 Special Microcontroller Features CMOS Technology Enhanced Flash program memory Low power high speed Flash technology 10 000 erase write cycle min for Wide operating voltage range 2 5V to 5 5V industrial temperature range 100K typical Industrial and Extended temperature ranges Data EEPROM memory Low power consumption 100 000 erase write cycle min for industrial temperature range 1M typical Self reprogranmable under software control Power on Reset POR Power up Timer PWRT and Oscillator Start up Timer OST Flexible Watchdog Timer WDT with on chip low power RC oscillator for reliable operation Fail Safe Clock Monitor operation detects clock failure and switches to on chip low power RC oscillator Programmable code protection In Circuit Serial Programming TM Selectable Power Management modes Sleep Idle and Alternate Clock modes dsPIC30F Motor Control and Power Conversion Family Program Mem Bytes Instructions dsPIC30F6010A 80 444K 48K 8102 408 5 45 30 015 144 4 8102 498 5 Page 76 dsPIC30F6010A 6015 Pin D
58. es Brace Lowes 2 67 0 64 8 65 10 8 0 00 0 56 12 6 0 00 0 03 12 6 0 00 045 12 6 Auger Casing peg as Components PCB 65 00 000 10 3 9 49 0 00 0 76 12 6 11 84 000 10 3 2 14 0 00 12 1 1 87 000 12 5 41 99 4 00 4 06 1 26 19 99 10 3 6 44 0 00 10 20 5 19 1 51 6 70 1 18 SN754410NE Ics www jameco com 1 95 10 3 11 1 28 0 59 0 59 1 28 1 28 8 00 1 30 Crystal 4 mHz www jameco com 74 154 IC www jameco com PCB etched Computer Components Microprocessor Wi Fi Module LCD Screen Keypad RFID Reader Chips Schmart Board 5 00 23 74 12 90 2 90 2 90 39 99 10 8 10 8 10 8 10 8 www microchip com www microchip com www futurlec com 6 78 WWW futurlec com 29 99 1 7 99 11 10 1 29 www parallax com www schmartboard com 15 89 Total Contingency Budget 619 02 410 98 1030 00 O Page 70 References 2 Page 71 Pueblo Colorado Federal Information Center Medication advice for seniors http www pueblo gsa gov cic_text health meds4old 697_old html 2 Minnesota Board on aging http www mnaging org pdf Prescription 20Drug 202002 PDF 3 Shopping page for a competing pill dispenser at Wheel Chair Select http www wheelchairselect com Telemergency royalty 100 VCW 1000 html 4 Dimensions Guide http www dimensionsguide com average kitchen dimensions 5 RadioShack s website http www ra
59. ess rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied Exposure to maximum rating conditions for extended periods may affect device reliability RFID Technology Overview Material in this section is based on information provided by the RFID Journal www rfidjournal com Radio Frequency Identification RFID is a generic term for non contacting technologies that use radio waves to automatically identify people or objects There are several methods of identification but the most common is to store a unique serial number that identifies a person or object on a microchip that is attached to an antenna The combined antenna and microchip are called an RFID transponder or RFID tag and work in combination with an RFID reader sometimes called an RFID interrogator An RFID system consists of a reader and one or more tags The readers antenna is used to transmit radio frequency RF energy Depending on the tag type the energy is harvested by the tag s antenna and used to power up the internal circuitry of the tag The tag will then modulate the electromagnetic waves generated by the reader in order to transmit its data back to the reader The reader receives the modulated waves and converts them into digital data There are two major types of tag technologies Passive tags are tags that do not contain their own power source or t
60. hat Repeat Sound Level 88 dB 10 cm Typical Med Priority Signal 3 Beeps that Repeat Frequency 975 24 Hz High Priority Signal 10 Beeps that Repeat Sound Harmonics Minimum of 4 1 to 4 kHz Operating Temp 30 C to 70 C 1 2 2 Storage Temp 30 C to 70 per IEC 60601 1 8 Tables 203 amp 204 Case Material Valox UL94 V0 Current Level lt 250 mA during time 10 mA during PAUSE time Continued 110 555 Alarm Con 1 Frequency Response Sound Pressure 198 Frequency r He Hz and there are more than 4 harmonic peaks between 1 and 4 kHz All harmonic peaks are within 15 dB of the fundamental frequency Priority Signal Activation GND Low Low Priority Medium Priority High Priority Priority Signal Details e Low Beep Pause 200ms Repeat every 20 5 Med Priority Beep Pause 200ms Pause 200ms Repeat every 7 5 sec s 100ms Pause 500ms Beep Pause 10005 Pause 100ms Pause 300ms Beep Pause 100ms Repeat every 2 5 5 Note Beep on time is 100ms high priority amp 200ms low amp medium priority Call 317 612 1000 or Visit www mallorv sonalert com for More Details 11 21 08 Ra a co s lt s Appendix Force Sensors Page 118 FSR 402 Data Sheet FSR 400 Series Ro
61. he A D converter for about a second for any changes in the sensor output If a pill is dropped on the sensor the program enters an empty infinite loop that causes the motor to stop dispensing include lt p30f6015 h gt include lt math h gt define CrystalFreq 7378200 define Millisec CrystalFreq 7378 int delay delay2 Functions and Variables with Global Scope void ADC Init void void stepMotor int delay 0 int delay2 0 0 0003 Page 78 for delay2 0 delay2 lt 2 delay2 for delay 0 delay lt 10000 delay j PORTE 0 0006 for delay220 delay2 2 delay2 4 1 for delay 0 delay lt 10000 delay 0 000 for delay2 0 delay2 lt 2 delay2 for delay 0 delay lt 10000 delay PORTE 0 0009 for delay2 0 delay2 lt 2 delay2 for delay 0 delay lt 10000 delay Functions ADC_Init is used to configure A D to convert 16 samples of 1 input channel per interrupt The A D is set up for a sampling rate of IMSPS Page 79 l Timer3 is used to provide sampling time delay The input pin being acquired and converted is AN7 void ADC_Init void l TRISB OxFFFF Port B 1s input ADPCFG OxFFFB 10th channel is sampled and coverted ADCON 1 OxOOEO ADC off output_format INTEGER Manual start of convesion Manual start of sampling ADCHS 0x0002 Connect RB10 on ANIO as CHO input ADCSSL 0 No scan
62. horizontal This means that the motor mount needed to hold the motor at a 45 angle Second the distance between the two gears must be a certain value This distance 1 determined by the diameters of the two gears If this distance 1 too small then the design will be impossible because the gears will be taking up too much space If this distance 1s too large then the gears will not mate with each other because they will be separated The goal was to have two thirds of the gear teeth overlap with each other Page 8 Pill Storage Bin Stand Motor Gear VA Figure 7 Design of the prototype The pill storage bin the auger and the two gears were 3d printed The bin holder and the motor mount were built out of Plexiglas A picture of the prototype 1 shown in Figure 8 A closer picture of the bin holder is shown in Figure 9 The lessons learned from this prototype revealed the need for several more changes to the design Page 9 Pill Storage Bin Figure 8 Prototype Build Page 10 Figure 9 Bin holder for the prototype The prototype ran successfully with all of the pills shown in Figure 10 Two tests were done for each pill In each test approximately twenty pills were placed into the device of the pills were then dispensed from the device In every case the device dispensed one pill at a time and no jamming occurred The one exception to this 1s that there was one minor malfunction with the purple
63. iagram 64 Pin 5 BER 5 THEME s 2555 8 x x L mig E lt x HEP w 1 uuu gt 328588853883 3 2 s 9 PWM3HRES 2 1 4605 EMUCT1 SOSCO ITTICHCNO RCT4 2 EMUDT1 SOSCIITACKICNTI RCT3 PWM4HIRE C 13 e EMUCZ OCT RDU 2 4 45E 3 ICATINTASRDHT SDIZ CNE RG 44 4 ICSHNT3RDTD SDO2ICNTORGS 16 43E 3 ICZ FLTB INT2 RDB MCLR Csr ICAIFUTATINTTIRDS Ca dsPIC30F6015 41E 31 Vee Vee Cog 01 OSCZ CLKO RCTS C410 OSCTCLEI ANS QEB ICBICNTIRBS 11 Vno ANA QGEAICTICNSIRBA 112 SCL RG2 ANXINDXI CNERB3i SDARGS3 ANZ2 SSTICNAJRB2 C14 EMLUCS SCEKTANTU RFS VWrer CNSRB1 C1 He WIRASDIVRFS ANU VREFHCNZ IRBO Cid EMUDSUITASDOURFS O25 26 L 20 19 AN IRBS 421 Coe 0 2 1 23 ANI4 RB14 Cosy AN13 RB13 L 1 128 ANT1S OCF B AZNT2 RB15 L 130 PGD EMUD AN T RB C18 AMTI RBT L 324 U2RX CNT17 RF4 131 UZTX CH1B RF5 L 332 77 PROTOTYPE CODE Ethan Lilly Last Modified 12 5 2011 This program 15 used with our most recent prototype It will step the motor 7 2 degrees and then continuously check t
64. ications were selected with intentions of making improvements on last year s project It will successfully provide the proper pills specified by the caretaker in a minimum of 40 out of 40 tests It will be able to service pills ranging from 10 mg to 1 g For the purposes of these technical requirements pills sizes will be defined by two dimensions and a shape One dimension will be the smallest dimension of the pill The other will be the largest dimension of the pill The device will be able to operate on pills with small dimensions between 0 5 cm 0 2 in and 1 cm 0 4 in It will be able to operate on pills with large dimensions underneath 2 5 cm 1 in The device will operate with pills shaped as tablets capsules and ovals It will weigh less than 130 N 30 Ibf Its dimensions will be less than 0 46 m 18 in high 0 38 m 15 in wide and 0 38 m 15 in long Last year s dimensions were 0 54 m 21 25 m 0 44 m 17 5 in and 0 48 m 19 1n respectively The spatial dimensions of the object are defined as the smallest cube needed to encapsulate the object For example the height of the device 1s the distance from the base of the device to the tallest point on the device A back up battery will be used as a fail safe in the event of a power outage It will be able to power the device for one week The device will have an alarm that will sound when the pill 1 being dispensed The alarm will have an intensity between 80 and 90 dB
65. inputs 00 01 02 amp D3 which also serve as the row drive signal pins Ro R1 R2 amp R3 see Figure Two While the EDE1144 is waiting for a Keypress it will hold these lines at 1111 high Once a key is pressed the data output pins will toggle while the keypad is scanned 50 that the EDE1144 can determine which key was pressed Then the appropriate data value see Table One will be output onto the data outputs via the row output pins and the Data Valid Output Pin 17 will go low This pin will stay low for 50 ms during which the Data Output pins will hold the Keypress data The keypress data should be sampled during this 50m5 window Both the Parallel amp Serial Data outputs are activated on each Keypress and autorepeat cycle designers using the parallel data outputs can ignore the serial data output and vice versa designers using the serial data output can ignore the parallel data output Page 104 Ethan Lilly Ihis program will allow for characters to be displayed on an LCD screen by pressing the appropriate keys on a keypad f include p30f6n015 h include lt string h gt include lt stdlib h gt include lcd h Macros for Configuration Fuse Registers copied from device header file FSCM OFF lt s FRC Set up for Crystal multiplied by PLL FWDT WDT OFF FBORPOR MCLE PWRI OFF turn off the power up timers Turn off the W
66. it has also been tested and a program has been written that can successfully turn multiple motors one at a time and in different directions The functionality of setting the time and getting the time for the real time clock has been programmed also the programming required to turn on and off the alarm has been finished The Wi Fi transceiver 1s the only component that the programming 1 not finished for Once this 1s done the final system program can be completed The processor will first be soldered to a SchmartBoard and then connected to a professional PCB A picture of the SchmartBoard can be seen below The 1 designed to have through holes that match the outer holes on the SchmartBoard Double sided male connectors will be used to attach the two boards j A amp Figure 48 This 1 a picture of the SchmartBoard that the processor will be soldered to The following design includes connections for everything that will be interfaced with the microprocessor It also contains the circuitry for the motor controller the keypad the alarm and the LCD screen The orange box shows the outline of where the SchmartBoard will be connected This design 1 10 2 x 10 2 cm 4 x 4 inches This board has been ordered from www 4pcb com Page 40 apga us E DE Oo a g p ote o oW ga m Ee 1
67. ls into the device and program when they should be dispensed by the device Page 139 The internal components of the device need to be secure This is to prevent unwanted access to the pills inside the device The device needs to hold a month s supply of pills This will increase the ease of use for the caretaker The device needs to notify the caretaker when the patient does not take their pills Operational Description Pills Loading Process Unlock and open the door of the device to access pill storage bins inside the device Insert each type of pill into one of the storage bins Be sure to only put one type of pill into each bin Close and lock the device Make sure the device 15 plugged into a power outlet and the power 1 switched on Programing Process Program the device using a laptop computer wirelessly connected to the device Specify the type of pills each storage bin Specify the doses and the times these doses are to be taken Enter the email address you would like to be notified at in the case that the patient does not receive their pills Patient Pill Retrieval Process Place RFID chip within four inches of the RFID reader to gain access to the pill retrieval area This will also turn the alarm off Grab pills from the pill tray Page 140 Technical Requirements A pills dispenser project titled PEZ was completed by one of the 2010 2011 Senior Design eroups Some of our technical specif
68. modulated signal measured at siena port Page 91 Appendix LCD Screen Page 92 HD44780U LCD II Dot Matrix Liquid Crystal Display Controller Driver HITACHI ADE 207 272 7Z 99 9 Rev 0 0 Description HD447380U dot matrix liquid crystal display controller and driver LSI displays alphanumerics Japanese kana characters and symbols It can be configured to drive dot matrix liquid crystal display under the control of a 4 or 8 bit microprocessor Since all the functions such display RAM character generator and liquid crystal driver required for driving dot matrix liquid crystal display are internally provided on one chip a minimal system can be interfaced with this controller dnver single HDAA780U can display up to one amp character line or two 8 character lines The HD44 7200 has pin function compatibility with the 44 7805 which allows the user to easily replace an LCD II with HD44780U The HD4A780U character generator ROM 15 extended to generate 208 5 8 dot character fonts and 32 5 x 10 dot character fonts for a total of 240 different character fonts The low power supply 2 7V to 5 5 V of the HD44780U is suitable for any portable battery driven product requinng low power dissipation Features 5xBand5 10 dot matrix possible Low power operation support 2 7 to 5 5V Wide range of liquid crystal display driver power 3 0 to Liquid crystal drive
69. n a swinging platform that sits near the bottom of the device Figure 58 Sensor Circuitry Page 49 Figure 59 Since the sensor needs a preload to be activated a preloading plate and bolts function as necessary weight Figure 60 Swinging platform integrated in the device Page 50 Figure 61 Sensor s outputs from outside vibrations vs pills dropping The left portion of Figure 61 shows the sensor s output from vibrations outside the device that does not activate the sensor The right portion shows when pills drop into the sensor This peak 1 the one the microprocessor reads and activates the sensor Inverter Design The schematic Figure 62 converts positive to negative voltage needed for the op amp in the force sensor to function properly The 100 uF capacitor charges through the second diode but when the output of the 555 timer 15 zero the same capacitor discharges through the first diode and the 0 01 uF capacitor gets charged Therefore the intersection of the anode of the second diode and the cathode of the first diode will always be negative with respect to the eround The negative voltage 1s slightly lower than the positive one but the positive voltage tends to be a little higher than its rated voltage The schematic on the left shows the DC voltage from the power supply and the one on the right simulates the testing shown on the pictures below Page 51 1144001 Figure 62 Inverter Multisim Schema
70. nd dispensing mechanism a new prototype was constructed new feature of this prototype that differentiates it from previous ones 15 that this included a design to synthesize the pill storage and dispensing mechanism with the device housing The design of the prototype is shown in Figures 4 and 5 The T shown on the back of the bin 15 the means by which the bin attaches to the rest of the device This T 1 designed to slide into bin holders on the device wall A drawing showing one of these bin holders 1 shown in Figure 6 most other respects this design was the same as previous versions Figure 4 Back view of the prototype Design Figure 5 Top view of the prototype design Page 7 Figure 6 Design of the bin holder The main purpose of this design 1 the convenience to the user The user will be able to easily remove pill storage and retrieval units from the device housing This allows for easy loading of pills easy washing of the mechanisms and customization of the types of mechanisms the user can put into the device A figure of the design of the prototype 1s shown in Figure 7 goal of this prototype was to build a bin slot and motor mount which would guarantee an accurate mate between the auger gear and the motor gear To achieve an accurate mate between the two gears two things need to be true First the axis of the motor shaft and the axis of the auger must be parallel The angle of the auger shaft 15 45 from the
71. ng for the electronic components has been done for each part individually except for the Wi Fi transceiver A large amount of integration into the final device has been done as well Moving forward our group will work quickly to finish up any of the tasks left over and continue to integrate components into the final device as they are completed A new Gantt chart has been made showing the current plan from now until the end of the project New Gantt Chart Page 66 Budget This section contains two budgets The first budget shows everything that our group will have to place an order for and spend the group money on The second budget is the supplement budget which shows what the prototype would cost if the group did not have access to any free items Here are some of the updates to the budget the professional PCB has been ordered a power supply was ordered several ICs were purchased including the keypad encoder and the half h motor drivers a SchmartBoard was ordered to help with soldering the processor the plexiglass was first cut professionally into smaller boards that could be used in the mill and finally the estimate for the 3D print material has been updated in the second budget These purchases were not expensive and our group 1 still in great shapes for coming in well under budget The updated budgets can be seen on the following pages Page 67 Mechanical Components Motors alltronics com Plexigl
72. ngine Features Dual data fetch Accumulator write back tor DSP operations Modulo and Bit Reversed Addressing modes Two 40 bit wide accumulators with optional saturation lagic 17 bit x 17 bit single cycle hardware fractional integer multiplier All DSP instructions single cycle 16 bit single cycle shift Peripheral Features High current sink source pins 25 mA 25 mA Timer module with programmable Five 16 bit timers counters optionally pair 16 bit timers into 32 bit timer modules 16 bit Capture input functions 16 bit output functions 3 wire SPI modules supports 4 Frame modes I C7 module supports Multi Master Slave mode and 7 bit 10 bit addressing Two UART modules with FIFO Bufters Two CAN modules 2 06 compliant dsPIC3060104 One CAN module 2 06 compliant 9521306015 Motor Control PWM Module Features Eight PWM output channels Complementary or Independent Output modes Edge and Center Aligned modes Four duty cycle generators Dedicated time base Programmable output polarity Dead Time control for Complementary mode Manual output control Trigger for A D conversions Quadrature Encoder Interface Module Features Phase A Phase B and Index Pulse input 16 bit up down position counter Count direction status Position Measurement x2 and x4 mode Programmable digital noise filters on inputs Alternate 16 bit Timer Counter mode Int
73. niversity 2nd Rough P Pandora Radio Listen to Free Interne gt Select Bin Page Asklepius Log In Page file M Senior Design Programs index html r Google E sklepius Username Username Password Password TT mue 2 27 2012 57 DAES SDS M Harding University 2nd Rough P Pandora Radio Listen to Free Interne Select Bin Page Asklepius Log In Page M Senior Design Programs binSelect htm sklepius Edit Medication Change Clock Setup Email Select a bin 7 35 PM a Pri 4 2 27 2012 M Harding University Mail 2nd Rough P Pandora Radio Listen to Free Interne Edit Medication Page x Asklepius Log In Page 9 11 file M Senior Design Programs EditMedication html vy 9 P E sklepius Edit Medication Change Clock Setup Email Bin 1 Name of Medication Number of Pills Daily Schedule Delete Time AM Instructions Put any special instructions here 7 36 r Pri 4 2 27 2012 Page 58 M Harding University 2nd Rough P Pandora Radio Listen to Free Interne Edit Medication Page Asklepius Log In Page e j D file M Senior Design Programs changeClock html e Go
74. nter drugs 1 The average number of pills taken daily by people over the age of 65 1s 2 9 More than one in five seniors take five or more different prescription drugs every day Here 1 a table showing the number of drugs taken daily by seniors 2 Table 1 Number of pills taken by people over 65 Pills Taken Percentage of Seniors 18 564 Keeping track of medication 15 burden for the elderly Arthritis poor eyesight poor hearing and memory lapses can make it difficult for some older people to take their medications correctly Studies have shown that between 40 and 75 percent of older people don t take their medications at the right time or in the right amount 1 The consequences for not taking medication properly can be fatal When two or more drugs are mixed in the body they may interact with each other and produce uncomfortable or even dangerous side effects 1 Medication users desperately need a product to keep track of their medication and administer the correct amount at the correct time Some people organize medication by putting it into a small container that is partitioned into seven smaller containers each representing a different day of the week This method is very tedious and also fails at organizing many varieties of medication It does nothing to help people remember to take their medication There 1s another device that allows a user to organize pills into 29 separate bins and set a timer that will alert the user
75. ogle 2 sklepius Edit Medication Change Clock Setup Email Current Time 12 00 AM Set New Time AM file M Senior Design Programs changeClock html f 7 36 PM i N 02 2 Firefox M Harding University 2nd Rough P Pandora Radio Listen to Free Interne lt Edit Medication ee Design Programs email html e 9 Google P EM sklepius Edit Medication Change Clock Setup Email Emails to be notified SomeEmail aWebsite com SomeEmail aWebsite com 7 36 PM 2 27 2012 Page 59 Alarm Design and Progress Initial Design The alarm will notify the patient the pill 1s ready to be taken One of the requirements for the alarm is that it should have a sound intensity between 80dB and 90dB It should also sound each time the device 1s ready to dispense pills Alarm Construction and Testing The sole component in this system is the Mallory Sonalert MSS5MI specifications can be found in Appendix It is a buzzer that outputs 88dB with a frequency of 975Hz The alarm 15 used with the high priority The high priority has several beeps repeatedly and it 1 the loudest This option has been chosen because it fulfills the sound intensity requirement to be between 80 90dB aiming to reach various places in a household with the same intensity The 5VDC is a signal that comes from the microproce
76. oise in the form of vibrations The prototype would fail by mistaking noise for a pill dropping into the pill retrieval area This failure only occurred when these vibrations were created by violently banging on the table the force sensors were resting on and this form of vibrational noise was deemed to be worst case scenario The solution to the problem was to suspend the pill retrieval area from the base of the device housing using string The string 1s attached to a hole at each corner of the pill retrieval area and acts as a damper by dampening much of the vibrations transferring from the device housing to the pill retrieval area The string is fishing string specifically because it 1s strong light weight and cheap There is potential that this problem could have been solved with digital filtering however the force sensors are not good at measuring the actual force placed on the sensor They are only good at detecting spikes in force This makes it difficult to distinguish between noise of a certain magnitude and the dropping of a pill This mechanical filtering method 1 an easy foolproof way of solving the problem Page 28 Figure 37 Pill Retrieval Area with Preloaded Force Sensor The four holes that will suspend the pill retrieval area are shown in Figure 37 and correspond to the four holes at the top of the U shaped supports in Figure 38 The preloading plate and bolts provide the necessary preload for the force sensor to det
77. on MODEL MONIMAL DETPET COTPUT MUX MAXIMUM OUTPUT PEAK DUTPUT TOTAL BIPPLE WOLTAGE VIG CONVECTION CURRENT CURRENT 2 REGULATION 2 55 1005 Oto Die 12 0 1 55 1017 12V Din 33A 0 to 454 5 0 1 5 1024 24V Din 1 64 0 to 2 3 2 5 0 1 Triple Output Model Selection VOLTAGE CURRENT CURRENT 1 DERRENT REGULATIOM lt 2 TL 5 to i HPs to 2A 0 2 to 2 5 5 1 00 0 0 0 to 07 1 5 1 43 34 05 0 4 0 5 to 5 0 5 1 BLPS5 33 N 5 0 0 to 2 0 0 to 25 0 5 1 00 0 0 0 to O 7A 1 5 1 WOTES 1 10 150 LAM average measurement of six equally destanced points through 35 x 1 6 cross sectional area with power supply mounted 0 25 standoffs Recommended airflow direction ts from the AC side to the DC side 2 Peak current duration for less than 30 Sec with maximum duty of 10 0 and load 4 Maximum paak to pask noise expressed 25 a percentage of output voltage 20 MHz bandwidth and bypass capacitors of 10 pF and 0 1 ur Ordering Information OPTIONS SUEFIXES ADO TD FART lead solder exem No RoHS character required for all substances Add 0 as the last character of the part number 1033540 Rev 1 06 00 Page 1of 8 www power ane com BLP55 AC DC Series Data Sheet one 55 W
78. ons is not implied Exposure to the absolute maximum rating conditions for extended periods may affect device reliability RECOMMENDED DC OPERATING CONDITIONS Ta 0 C to 70 Ta 40 C to 85 C Notes 1 2 aweTtn smwmo commons wm 48 55 V Sed Wwe e fwo Vex Batery voe we l DC ELECTRICAL CHARACTERISTICS Vee 4 5V to 5 5V Ta 0 C to 70 C T 40 C to 85 C Notes 1 2 9 8 8 1216x 125x 1 284 x Vugar DC ELECTRICAL CHARAC TERISTICS OV Vear 3 0V Ta 0 to 70 Ta 40 to 85 Notes 1 2 NM M LM M M Current OSC SQW OUT OFF Current OSC ON _ SQWIOUT ON 32kHz owe Vaar Data Retention Current Oscillator Off toe WARNING Negative undershoots below 0 3V while the part is battery backed mode may cause loss of data Page 127 051307 64 x 8 Serial IC Real Time Clock TIMING DIAGRAM STOP START Figure 1 Block Diagram 192 4 86kHz 8 192kHz 32 768 BUFFER Oscillator and divider CONTROL CLOCK CALENDAR AND CONTROL 051307 REGISTERS SERIAL BUS INTERFACE AND ADDRESS USER BUFFER REGISTER BYTES Page 128 051307 64 x 8 Serial Real Time Clock PIN DESCRIP TION Connections for Standard 32 58kHz
79. ontroller processor The host microcontroller receives Keypress data via either the four parallel data outputs 00 03 Pins 6 9 or the Serial Data Output Pin 1 The Data Valid signal Pin 17 is activated upon keypress and upon each key repeat cycle if key is held The Data Valid signal is activated prior to transmission of the serial data to allow polled software LU ART style host serial systems such as the BASIC Stamp or microcontroller without a hardware to enter the serial receive routine and receive the keypress data without needing to continually wait for the start bit Note that the data outputs to the host microcontroller reside on the row output pins Pins 6 9 therefore parallel output data should only be read while the Data Valid Pin 17 signal is active low Upon powerup the four data output pins will be high and will remain high except when a key is pressed The following table illustrates the data values returned by the serial and parallel outputs of the EDE144 upon each Keypress Note that the serial values are increased by Hexadecimal 30 30 for 0 9 and Hex 37 for 10 15 to correspond to the ASCII equivalent 0 8 A F of the BCD binary coded decimal value on the parallel outputs 12222121212 22122 o a 31009 301 1 Toto o1 Table One Keynumber vs Output Data Page 102 OVERVIEW OF OPERATION Table One of the previous page illustrates the data that is output
80. ority of RF energy is emitted If the tag is held sideways for example perpendicular to the antenna you ll either get no reading or a poor reading distance Only one transponder tag should be held up to the antenna at any time The use of multiple tags at one time will cause tag collisions and the reader may not detect any of them The tags available in the Parallax store have a read distance of approximately 4 inches Actual distance may vary slightly depending on the size of the transponder tag and environmental conditions of the application Communication Protocol All communication is 8 data bits no parity 1 stop bit and least significant bit first 8 1 at 2400 bps The RFID Card Reader Serial version transmits data as 5V TTL level non inverted asynchronous serial The RFID Card Reader USB version transmits the data through the USB Virtual COM Port driver This allows easy access to the serial data stream from any software application programming language interface that can communicate with a COM port When the RFID Card Reader is active and a valid RFID transponder tag is placed within range of the activated reader the tag s unique ID will be transmitted as a 12 byte printable ASCII string serially to the host in the following format Unique ID Stop Byte Digit 10 0 00 The start byte and stop byte used to easily identify that a correct string has been received from the reader they correspond to line feed and ca
81. plementation of a wireless web server The MRF24VWBO MA MRF24VVBOMB modules have received regulatory approvals for modular devices in the United States Canada IC and Europe ETSI The modular approval removes the need for expensive RF and antenna design and allows the end user to place the modules inside a finished product and not require regulatory testing for an intentional radiator RF transmitter They also have Radio Type Approval Certification for Japan See Section 3 0 Regulatory Approval for the specific requirements that should be adhered to by the integrator 1 1 Interface Description The block diagram in Figure 1 1 represents a MRF24WVBOMAMRF24WBOMB module It interfaces to Microchip 18 PIC24 dsPIC33 or PIC32 microcontrollers through a four wire serial slave SPI interface interrupt hibernate reset power and ground signals The module runs on a single supply voltage of nominally 33 also supports optional JTAG and serial debug for testability The debug port operates at 3 3V and requires level shifter for operation with RS 232 devices Figure 1 2 shows a simplified example connection between a Microchip PIC MCU and the module Table 1 1 lists the pin descriptians Data communications with the MRF24VV B MA MRF24WBOME are through the SPI interface that is detailed in Section 2 0 Circuit Description The Microchip PIC microcontroller communicates with the module through a command API from
82. ps 10 dBm Typical output power with control Integrated low phase noise VCO RF frequency synthesizer PLL loop filter and Digital VCO and filter calibration Integrated RSSI ADC and 1 0 DACs RSSI readings available to host Balanced receiver and transmitter characteristics for low power consumption MAC Baseband Features Hardware CSMA CA access control automatic ACK and FCS creation and checking Automatic MAC packet retransmit Hardware Security Engine for AES and RC4A based ciphers Supports 802 1x 02 1i security WEP WPA PSK and V PA 2 PSK pplications Utility and Smart Energy Thermostats Smart Meters White Goods HVAC Consumer Electronics Remote Control Internet Radio Home Security Toys Industrial Controls Chemical Sensors HVAC Security Systems M2M Communication Remote Device Management Location and Asset Tracking Automotive Code Update Retail POS Terminals Wireless Price Tags Digital Remote Medical Fitness and Health care Glucose Meters Fitness Equipment Patient Asset Tracking Page 84 MRF24WBOMA MRF24WBOMB Pin Diagram JT Ab JI AG JTAG TMS TDI RESET NL Antenna connector on MEF24VBDMB only I on Ecorn 501 SLK INT 500 VLL GND GND NL GND TX RX JTAG EN HIBERNATE Page 85
83. que has been more than doubled and there should not be jamming problems due to an insufficient amount of torque The motors don t ever pull more than 0 3 A of current and the half h drivers are rated for up to 1 A There have not been any problems with this 1n the testing that has been done so far Page 48 Force Sensor One of the requirements of the project 1 that the device must be reliable meaning it needs to dispense correctly consistently The sensor will be able to fulfill the requirement in that it will make sure that once a pill has been dropped the dispensing will stop Initial Design There was going to be four sensors placed to cover the whole area taken up by the tray where the pills were dispensed A different spike would signal when there had been more than one pill dispensed at a time The spikes would be compared and read by the microprocessor to determine when to stop the motors The sensors selected are force sensors FSR 402 from Interlink Sensors See Appendix They need 5V to operate and their reading force is from 0 1N up to 10N It was going to be placed at the bottom of the device New Design Construction and Progress Since the platform where the pills are being dispensed is 0 1016 x 0 0508 m 4 x 2 in one sensor as opposed to four placed in the center can recognize if a pill has been dropped anywhere in that area To prevent the sensor from reading vibrations on the counter or table the sensor is now i
84. r shaft were misaligned Figure 14 shows this misalignment The motor gear would drive the auger gear with some interference It was clear that a new method was needed to integrate the bin into the device It was decided that the best method would be to print the bin holders and motor mounts using the 3d printer Parts made using the 3d printer are much more accurate that those made by cutting Plexiglas with a band saw The design for the new bin holder is shown in Figure 15 This part will be attached to the device wall using mechanical fasteners The bolts will go through the holes in part Using mechanical fasteners 15 more accurate than gluing because parts that are in the process of being glued together are susceptible to slipping while the glue 15 drying The holes can be drilled into the device wall very accurately using the milling machine that 1s located in the machine shop in the Harding University Ulrey building This machine has a digital readout specifying the position of the tool head allowing for very accurate positioning of the tool head position This means that the holes can be drilled at where they need to be within acceptable tolerance Figure 14 Misalignment between auger gear and motor gear Page 13 Figure 15 Design of the bin holder A similar design process was carried out for the motor mount The motor mount will be 3d printed to ensure high accuracy A picture of this design 1s shown in Figure 16 Figu
85. r supplies are disabled by driving the HIBERNATE pin high Figure 2 2 shows the power up sequence for the MRF24VWB MA MRF24V BOMB There is an internal Power on Reset POR circuit which keeps the module in reset until VDO is within specification The Hibernate and Reset signals are also used to control startup In Figure 2 2 section is controlled by the internal POR and section B is an allowance for the bus to stabilize when the module supplies enabled Once Hibemate is disabled the host software provides 1m35 of startup to allow the to stabilize This time is pre programmed into the host driver and may need to be increased if insufficient initial drive current is not provided to the 2 module Section C is the driver controlled release from Reset period This takes approximately 300 mS and is monitored by the stack driver Mo additional time needs to be provided by user software for startup Page 88 MRF24WBOMA MRF24WBOMB 2 9 Power States MRF24WBOMA MRF24WB UMB has several power states These are Hibernate Sleep and Active two sub states as shown in Figure 2 3 The selection of power state directly affects system behavior and overall power consumption or battery life There is also a Standby state that is not user controlled 2 3 1 An state is defined as no power applied to the device The Hibernate mode is the closest to controll
86. ransmitter When radio waves from the reader reach the chip s antenna the energy is converted by the antenna into electricity that can power up the microchip in the tag typically via inductive coupling The tag is then able to send back any information stored on the tag by modulating the reader s electromagnetic waves Active tags have their own power source and transmitter The power source usually a battery is used to run the microchip s circuitry and to broadcast a signal to a reader Due to the fact that passive tags do not have their own transmitter and must reflect their signal Page 112 to the reader the reading distance is much shorter than with active tags However active tags are typically larger more expensive and require occasional service Frequency refers to the size of the radio waves used to communicate between the RFID system components Just as you tune your radio to different frequencies in order to hear different radio stations RFID tags and readers must be tuned to the same frequency in order to communicate effectively RFID systems typically use one of the following frequency ranges low frequency or LF around 125 kHz high frequency or HF around 13 56 MHz ultra high frequency around 868 and 928 MHz or microwave around 2 45 and 5 8 GHz The read range of a tag ultimately depends on many factors the frequency of RFID system operation the pawer of the reader and interference from other RF de
87. re 16 Design of the Motor Mount The full integration of all of these components with the device housing 1s shown in Figure 17 This figure 1 not a drawing of the overall device It only shows how the dispensing mechanism the motors and the device housing integrate together The holes in the device Page 14 housing are designed to match exactly with the holes the bin holder and the motor mount Bolts pass through these holes to connect these parts to the device housing An up close view 1 shown in Figure 18 Everything is positioned exactly to ensure that two thirds of the teeth overlap in the mating auger and motor gears Figures 19 shows the layout of holes in one side of the device housing This will serve as the template for drilling the holes with the milling machine Bolts attach the bin holder to the device housing Figure 17 Integration of the dispensing mechanism motor and device housing Holes for next bin holder Holes in device housing and bin holder line up Figure 18 Up close view of the integration Page 15 Figure 19 Template for drilling holes in the device wall Some changes were made in the design of the auger casing mechanism First the minor diameter of auger was increased from 0 64 cm to 1 27 cm 0 25 in to 0 5 in This new auger is shown in Figure 20 This design change should assist with the dispensing of pills that are very long A prototype that was 3d printed
88. rriage return characters respectively The middle ten bytes are the actual tag s unique ID For example for a tag with a valid ID of OFO184F07A the following bytes would be sent 0x30 0x46 0x30 0x31 0x38 0x34 0x46 0x30 0x37 0x41 0 00 Interference The Parallax RFID Card Reader like many RF devices may experience RF noise its frequency range This may cause the reader to transmit a spurious tag response when no tag is near the unit This will not affect mast uses of the RFID Card Reader To avoid treating spurious responses as legitimate tags it is recommended to read two responses in a row within a given amount of time for example one second to ensure that you are reading a valid tag and not a tag generated by noise Page 111 DC Characteristics At Ver 5 0 and Ta 25 C unless otherwise noted Test Supply Votage ve 88 V Supply Curent le ee _ Supply Curent Actve lee o 200 Output LOW Va V OupuHiGHwotags Von L v Absolute Maximum Ratings Condition value Operating Temperature 40 C to 85 Storage Temperature 55 C to 125 Ground Voltage V Voltage on any pin with respect to V 0 3V to 7 0V Supply Voltage Vor 4 5V to 5 5V NOTICE Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device This is a str
89. s NOTES 1 10 CFM or 150 LFM average measurement of siz aqualy distanced points through 3 5 x 1 6 cross sec on 0 25 Recommended airflow direction is from the AC sida to the DC side areal with power super mouriad Page 133 BLP55 AC DC Series Data Sheet 55 Watts Changing the Shane af Power Figure 1 55 3000 Typical Quasi Regulation Performance for 12V Output 12V Output Voltage Volts 0 5 1 15 2 25 12V Output Current Amps Figure 2 BLP55 3000 5V Output Voltage vs 12V load 5 2 5 1 H 4 9 gt 48 47 4 6 4 5 0 0 5 1 1 5 2 25 12V Load in Amps Page 134 BLP55 AC DC Series Data Sheet nn 55 Watts ead Changing the Shape af Powar Overall Size 3 00 x 5 00 x 1 23 76 2mm x 127 0mm x 31 2mm Weight 0 51 Ib 023 Mechanical Drawing Single Output Models eo NENNEN TU im KS uB PL CN2 DiC TABLE m2 GSU MET MHNT EZ FASDCH THEE PETER PUMA LLS HOUSING PIN MOLEX 22 ET EC 0 Thie ls an outline drawing only The detalled location of co Page 135 BLP55 AC DC Series Data Sheet 55 Watts power DITE Changing the Shape af Power Overall Size 3 00 x
90. s up to dispensing a pill from each bin 24 times We will do eight days worth rather than seven to account for the total time throughout the week that the device 1 not dispensing The intensity of the alarm will be measured with a digital display sound level sensor from radio shack 5 The sensor reads from 50 to 126 dB and will be placed within one meter of the device The alarm intensity will be measured from within this distance 10 times The mean of these measurements must fall within the range listed in the technical requirements Random people will be asked to program the device The number of people that perform this test must at least be above 10 The time it takes a person to program the device will be recorded by one of the team members The time needed to program the device does not include the time taken to learn how to use the device The programming time of all of the testers will be averaged To successfully meet the ease of use requirement this average must be under five minutes To determine that a container holds a month s supply of pills 90 pills will be poured into a container If all of the containers are the same size then this test will only need to be performed on one of the containers If the containers are different sizes then this test will be performed on the smallest container The pills used in this test must be category four To successfully meet this test 90 pills must fit into the container without spilling over
91. s will again be used to display characters as they are typed AII 64 characters will be used for displaying special instructions to the patient for taking medication Currently the code required for initializing the screen sending characters and all other necessary commands has been written and thoroughly tested Currently a header file that has functions for initializing the LCD printing characters to the screen printing whole strings to the screen clearing the screen and moving the cursor has been written This program has been integrated with several other programs in order to output messages to the LCD screen For example the program for the RFID reader outputs a confirmation message to the LCD screen when card 15 detected and for the keypad the buttons pressed are output onto the LCD screen The contrast for the LCD 1 controlled using a single potentiometer The backlight for the LCD will be controlled by the processor using a single output and a transistor No more work 15 anticipated to be done with using this device other than to solder it to the control system PCB Page 53 7 p 3 F aaia t ILL D IL a mil gt ah 164 1 MADE IN CRYSATL 0840 Figure 64 This is a picture of the LCD screen with a printed message Figure 65 This shows the LCD connected to the processor Page 54 Keypad and Encoder This will be used with the LCD screen for initially setting up the device
92. sed sequentially until STOP condition is executed When Voc falls below 1 25 x Vear the device terminates an access in progress and resets the device address counter Inputs to the device will not be recognized at this time to prevent erroneous data from being written to the device from an out of tolerance system When falls below the device switches into low current battery backup mode Upon power up the device switches from battery to when is greater than 0 2 and recognizes inputs when Vcc is greater than 1 25 x The block diagram in Figure 1 shows the main elements of the serial RTC Page 129 Appendix J Power Supply Page 130 BLP55 AC DC Series Data Sheet ER 55 Watts Power one 2 8 Features RoHS lead free solder and lead solder exempted products are available Industry standard 3 x 5 footprint Main output remote sense marked to Low Directive Compliance to EMG1000 4 2 3 4 5 6 8 The BLP55 Senes economical and compact construction provides single or three output ac dc power conversion to meet the requirements of networking and communications systems as well as commercial and industrial configurations The BLP55 is rated for convection as well as forced air cooling Full output power is available with extemal forced air cooling features include main output remote sense and an intemal EMI filter Single Output Model Selecti
93. sion driver Clock to shift serial data D Switch signal for converting the liquid crystal drive waveform to AC Character pattern data corresponding to each segment signal Common signals that are not used are changed to non selection waveforms COMS to COM16 non selection waveforms at 1 8 duty factor and 12 to COM16 are non selection waveforms at 1 11 duty factor Segment signals Fower supply for LCD drive W5 11 V max 2 7V to 5 5V GND OV When crystal oscillation is performed a resistor must be connected externally When the pin input is an external clock it must be input to OSC1 Page 96 include lt p30f6015 h gt include lt string h gt include lt stdlib h gt void lcdDelav I int delay 0 int delay2 0 for 0 lt 1 2 for 0 lt 2500 this function is used to clear the display void clearLCD Set the command to clear the display PORTE 0 0001 0 0000 5 the command 0 0004 lcdDelay PORTF 0 0000 ledDelay this function is used to turn on the display and show a blinking cursar void initLCD I 5et the command to turn on all 4 lines PORTE Ox0036 PORTF 0 0000 5end the command PORTF 0 0004 1 1 Set the command to turn the display and show blinking cursor
94. ssor and activates a transistor to power the component Figure 68 shows the alarm circuitry integrated with the microprocessor J eee Transistor Figure 68 Alarm circuitry Page 60 NATIONAL INST RUMENTS Cursors dT RMS 4 982 V Freq 324 047 Hz Vp p 121 19 __ Sample Rate 200 5 5 NATIONAL P INSTRUMENTS Sample Rate 40 kS s Lc RMS 5 091 V Freq 31 617 Hz Vp p 2 56 mV Figure 69 Oscilloscope Reading of the Alarm An oscilloscope was used to test the output of the system The square peaks in Figure 69 show when the alarm is and when the alarm 15 off the output is constant in SV There is greater frequency when the alarm is on Figure 70 shows two decibel meters that were used to test the decibel range of the alarm when it was on to meet the sound intensity requirement The first meter simply shows an average reading The second meter shows three readings the current reading 88 dB was at the moment when the alarm was on the average reading 70 dB is the room with the air conditioning system on and the alarm 1 off and the highest reading 85 dB shows the previous set of beeps Current Average Highest Figure 70 Sound intensity testing for the alarm in decibels Page 61 n la Ject P Organization and Management The Asklepius Pill Dispenser team comprises two mechanical
95. ted Now a time can be set to the clock and stored even after power to the board has been removed because the clock s separate backup battery maintains the value stored in the clock The program written can set the time and retrieve the time and output the retrieved time to the LCD screen as shown below There will be no more work required for programming this component The code for this can be seen in appendix I Page 44 gt OD Ve t LCD Screen Real time Clock Figure 54 This shows the real time clock circuit on the right connected to the processor in the middle with its output on the LCD screen to the left Motor Controller Circuit This circuit has been partially breadboarded to test that 1 will work A program was written that successfully controlled multiple motors one at a time The processor can also change the direction the motors turn using a single output A program was also written to test this circuit with the door motor It successfully opened the door paused and fully closed the door using this circuit Page 45 XOR Gates JK Flip Flops SE A TET Half H Drivers Demultiplexer NOT Gates Figure 55 This shows the demultiplexer bottom left driver logic top left and motor driver chips right Each motor will have one of the 754410 half h driver ICs In order to do this 10 small PCBs will be used to hold each motor driver Below 1 a picture of one of the circuits that has
96. tested to be convenient on a counter top much like a microwave Also it 15 preferable to attach electrical components to a stationary part Both the keypad and LCD screen will have wires attached to them These wires would get 1n the way of the user when they raise the lid The lid can be seen in both Figure 32 Page 23 Figure 32 Hinged Lid Opened Construction of Pill Retrieval Door Figure 33 shows the initial design of the pill retrieval door from last semester The initial design used two smooth surfaced horizontal tracks that constrained the door on top and bottom and motion was to occur in the form of sliding along the tracks Dr Miller pointed out that this design of the pill retrieval door would likely cause the door to bind due to the friction along the two tracks Instead of redesigning the entire subsystem the issue was resolved by adding wheels to the door to reduce friction This solution saved time in our schedule because time was not wasted completely redesigning the door Also it saved money in our budget because the eight wheels were obtained from two small toy cars Page 24 Figure 33 Initial Design of Automated Pill Retrieval Door and Rack and Pinion System Construction of the pill retrieval door began by cutting the 10 16 cm x 10 16 cm 4 inx 4 in doorway out of the front panel of the device housing as shown in Figure 34 The doorway was cut using a standard mill and was a slow process b
97. the PIC microcontroller on a normal available indication If data is available on a DTIM check the module reenters the Power Save state until the next DTIM interval is programmed at the Access Point This state can provide as if on behavior of the radio with a significant power savings versus always on The battery life expectation of this mode is several days to several weeks This mode is characterized by a very low latency as low as 200 mS to begin data transfer from the low power state 2 33 ACTIVE STATE The Active state is identified one of two states where the radio circuitry is fully on The two active states are the Receive state RA ON and the Transmit state TX ON 2 3 4 STANDBY STATE The Standby state is not user controlled but is noted as it helps identify and track certain operations of the module during power tracing MRF24WBOMA MRF24WBOMB POWER STATE DEFINITIONS Ov completely disconnected is completely disconnected internal power regulators are OFF enabled by pin se Enabled by TCP IP driver Receive circuits are on and receiving TX ON 3N O Transmit circuits are on and transmitting Standby 33v O State machine transition state only not user controlled Page 89 MRF24WBOMA MRF24WBOMB 40 ELECTRICAL CHARACTERISTICS TABLE 4 1 DIGITAL ELECTRICAL CHARACTERI
98. tic Figure 63 Inverter Testing Figure 63 shows the testing for the inverter circuit to operate the op amp in the force sensor Its output voltage is a few volts lower than the input voltage yet it functions properly Page 52 User Interface System Overview The purpose of this system 1 to allow the caretaker to set up the device and for the patient to receive their medication More specifically the caretaker will use an LCD screen and keypad to initially connect the device to a Wi Fi network Then the caretaker will use a separate computer connected to that same wireless network to program the device to dispense the patient s medication in the right amount and at the correct times When the alarm sounds for the patient to retrieve their medication the patient will scan an RFID chip and the device will allow access to the dispensed medication and display any special instructions that go with that medication on the LCD screen LCD Screen This will be used for initially setting up the device with the wireless network and for giving any special instructions to the patient when taking medication The screen can display four lines of 16 characters at one time so when connecting the device to the Wi Fi network the top two lines will prompt the user to enter the name of the network and the second two lines will display characters as they type them After that the top two lines will prompt the user for the password and the bottom two line
99. to 250 mg 250 mg to 500 mg 500 mg to 750 mg and 750 mg to 1 g For example a pill that weighs 100 mg 15 a category one pill The 40 tests will be divided evenly between these four categories meaning that 10 tests will be done with pill sizes in only one category The device must perform successfully 40 consecutive tests with the variability of pill types as described above device will be weighed with a bathroom scale to determine that it meets the weight requirement The device will be weighed four times The mean of these measurements must be under the requirement listed the technical requirements Page 143 The device will be measured to determine that it meets the volume requirements These measurements will be made with a measuring tape The height width and length of the device will be measured four times each The mean of these measurements must be less than requirements listed in the technical requirements For example the height of the device will be measured four times with a measuring tape These four measurements will be averaged and must be less than 0 46 m The definition of the height weight and length is described in the technical requirements The life of the back up battery will be tested The battery will be fully charged and the device will undergo eight days worth of dispensing in a 24 hour period This assumes the Worst case scenario of dispensing a pill from every bin three times a day which add
100. ttery indicator circuit will be attached to the battery circuit in the power supply circuit with a switch that if it is turned on and there is enough voltage to operate an LED will turn on similarly if the switch is on and there 1s not enough voltage no LED will turn on The voltage considered high enough for the LED to turn on is 7 7V or higher Figure 46 shows this scenario of having the switch off on the left side and the switch on with the LED on on the right side f e 0 G q Figure 46 Battery indicator circuit with the switch off and Page 38 Control System Overview The overall purpose of this system 15 to control all of the other components of the device using electrical signals so that the device operates according to the specified requirements More specifically this system makes sure that the pills are dispensed when they are supposed to be that the right amount of pills are dispensed that the patient receives the pills and that the caretaker is informed if anything is wrong This system communicates with most of the other systems to achieve this of the information about the medication in the device such as how many pills there are in each bin when each pill should be dispensed and how many of each pill should be dispensed 1s all stored in the control system Microprocessor Currently the processor has been put onto a breadboard using a 64 pin socket that has been
101. und Force Sensing Resistor Description Interlink Electronics FSR 400 t amd DR series is part of the single zone m Force Sensing Resistor family orce as low CLR Force Sensing Resistors or FSRs are robust polymer thick film PTF devices that exhibit a decrease resistance with increase in force applied to the surface of the sensor This force sensitivity is optimized for use in human touch control of electronic devices such as automotive electronics medical systems and in E industrial and robotics applications E The standard 402 sensor is a round Robust up to 10M actuation sensor 18 28 mm in diameter Simple and easy to integr Custom sensors can be manufactured in sizes ranging from 5mm to over 600mm Female connector and short tail versions can also be ardered Industry Segments Game controllers Medical device control Navigation Electron Industrial HMI Figure 1 Force Curve Figure 2 Schematic 1 EH T Ht H Automotive Pi HT 7 Consumer 10 100 10000 FORCE jg Interlink Electronics Sensor Technologies www interlinkelectronics com FSR 402 30 81 794 Device Characteristics Feature Condition Actuation Force 0 1 Newtons Force Sensitivity Range 01 100 Newtons Force Repeatability sigle
102. vices Balancing a number of engineering trade offs antenna size v reading distance v power v manufacturing cost the Parallax RFID Card Reader s antenna was designed specifically for use with low frequency 125 kHz passive tags with a read distance of around 4 inches Ethan Lilly This program will allow for an RFID card to be read and confirmation message to be displayed on and LCD screen include lt p30T6015 h gt include lcd h Macros for Configuration Fuse Registers copied from device header file _FOSC CSW_FSCM OFF FRC XT PLL8 Set up for Crystal multiplied by Bx PLL FWDT WDT OFF Turn off the Watch Dog Timer tunctions void initRFID set the enable pin on the RFID reader to LOW PORIFbits RF5 0 printString Ihe RFID reader has been enabled 32 void initUART U2BRG 0 00 7 set the baud rate to 2400 bps U2MODEbits PEDSELO 0 U2M0DEbits PDSEL1 D set UART to 8 bit no parity U2MODEbits STISEL 0 aet UART to 1 stop bit 25 0 the interrupt is triggered soon character is recieved IFSlbits U 2ZRXIF 0 set the interrupt flag to low IEClbits U2EXIE 1 enable the interrupt U2MODEbits UARTEN 1 enable the UART Module Page 113 void attribute interrupt U2RXInterrupt void int main PORTE 07 5et all of PORTE to 0 IRISE 0 0000 make these ports set to output PORTB 07 f 5et
103. waveform frequency AC waveform Correspond to high speed MPU bus interface 2 MHz when 5 4 bit or 5 bit MPU interface enabled 80 x 8 bit display 80 characters max 9 970 bit character generator ROM for a total of 240 character fonts 208 character fonts 5 x 8 dot 32 character fonts 5 x 10 dot Page 93 HD44780U 64 x amp bit character generator RAM 8 character fonts 5 8 dot 4 character fonts 5 x 10 dot l6 common x 40 segment liquid crystal display driver Programmable duty cycles 1 8 for one line of 5 dots with cursor 1 11 for one Ime of 5 x 10 dots with cursor 1 16 for two lines of 5 x 8 dots with cursor Wide range of instruction functions Display clear cursor home display on off cursor on off display character blink cursor shift display shift Pin function compatibility with 47805 Automatic reset circuit that initializes the controller driver after power on Internal oscillator with external resistors Low power consumption Ordering Information Type No Package CGROM HD44780UA00FS Japanese standard font HCD44780LIAQD Chip HD44780UA00TF TFR 80F HD44780UA02FS FP 80B European standard font HCD4A47T80LIAQ2 Chip HD44780U A02 TF HD44780UBxxFS FP 80B Custom font HCD44780UBxx Chip HD44780UBxxTF Note xx ROM code Page 94 HD44780U HD44780U Block
104. when it 1s time to take their medication 3 The problem with this 1s that each bin only has enough space for three pills at the most and the alarm can only be set to go off once a day It also does not dispense the pills but leaves them accessible to the user The Asklepius medicine dispenser will solve these problems making it easier to organize medication It will be quick easy to setup and will allow a person to stay organized for a month at a time The device will also sound an alarm when it 1s time to take the medication The Asklepius medicine dispenser is the superior alternative Page 138 Problem Statement Taking the correct medication at the correct time 15 challenging for the elderly and can be a burden on loved ones Not taking medication properly can be very dangerous and potentially fatal The age 65 and over market demands a cost effective device that will keep track of and dispense the proper amount of medication at the right time The device would serve solid orally ingested tablets and capsules Throughout the report this medication will be referred to with the term pills Customer Needs The caretaker 1s the person who sets up the device and 1s assumed to have the technical skills of an average person meaning anyone who can operate a computer to browse the internet and do basic things such as shopping online The patient 1s the person receiving pills dispensed from the device and might have mental difficulties The
105. with the wireless network It also needs to be inexpensive and use very little power This keypad was also found at www futurlec com and was selected to be used with the device The cost of the device is only 3 and uses similar power to the other keypads When entering in the network information the caretaker will have to press the buttons multiple times to enter letters For example to enter a b the caretaker would push the number two key three times Upper case letters come after the lowercase letters so to get a B the caretaker would press the number two key six times total The star key will be used as backspace and the key will be used to signal that they are done entering characters These will be clearly labeled on the keypad and explained in the user manual This is fairly complicated which 1 unfortunate but 1t will generally only be used once for initial device setup An EDEI144 keypad encoder will be used with this keypad It has four outputs that will be read by the processor for determining what key was pressed It also sends an interrupt signal to the processor so that the processor knows when to read the data lines These components have been put onto a breadboard and tested of the code required for the processor to read in data from the keypad as earlier specified has also been completed For a detailed look at the keypad and encoder s features and some code see Appendix D DP M ice Output to Processor g
106. within the Microchip TCP IP stack The command API detailed in the Microchip TCPAP stack online help that is included in the free Microchip Application Libraries download Page 86 MRF24WBOMA MRF24WBOMB TABLE 1 1 Pin Description Pin Symbol Description 000000000 3 GND P 3 wc N pontem 3 mem o 4 max 1 constant ue JTAG Reset input optional see Section 2 0 Circuit Description P jom SSCS NC Domtcomet O _ NO NC l Write protect this pin is used to enable FLASH update x P Power _ P _ KU Hibernate mode enable high input will disable the module mAGtesenbe Nc Nc Donat connect NE NEL 1 SPI Chip Select input constant drive or pull up required NC jDontcomet SSS 3 emp e 268 DEBUGRX Serial debug port input see Section 2 0 Circuit Description LECCE LX Serial debug port output see Section 2 0 Circuit Description 38 P Power e 32 So 0 0 33 INT 0 jlmtemuptoutput opendraim requres a pull up 34 1 gjSPidekipu Legend Pin type abbreviation

Final Design Review - Harding University

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