Fresh Water Aquarium Monitor Team Name: “Finding Nemo”
Contents
1. Bluez Dec5 Blue LCDOut 0 Move cursor to the beginning of the second line LCDOut Green dec5 Green RG Green 10 IF Red RG gt RG 2 Then RG 8 Red RG 1 Else RG 8 Red RG EndIF pH 0 RG 10 50 pH 1 pH 0 10 pH 0 pH 0 10 LCDOut pH 0 pH 1 Pause 2000 Return Teese 2h E E 2 2 k he he k k k kk Ei sh Feeding Loop RP EERE EERE is FishFeed PORTD 0 1 sets portd 0 high for chip enable1 PORTD 3 1 sets portd 3 high for chip enable2 For run z 1 TO 5 step through the sequence 5 times GoSub motorRun go to the subroutine motorRun Pause 150 Next run increment the run count Pause 100 PORTD 0 0 sets portd 0 low for chip enable to disable PORTD 3 0 sets portd 3 low for chip enable2 to disable Return ok ok ake ake ake ake kaka kkk k Motor Rotation Input 1234 Output 1234 CE 1111 1001 INI 0110 2 0110 IN2 0011 Out3 1100 CE 1111 Out4 0011 motorRun Pause 100 steps steps 1 PORTD stepArray steps 4 Pause 100 Return Enable COMMUNICATIONTHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHE I2C READ TIME GoSub I2C START Read Time 12 outZSAddW GoSub DC TX i2c_out 02 Start reading at Seconds address GoSub DC TX GoSub C START i2c_out SAddR GoSub I2C_TX ShiftIn SDA SCL 0 i2c in 0 Shift in first byte MSBF ShiftOut SDA SCL 12. Buttons PORTB 0 1 T3OF 0 SAddR 10100001 Slave Read SAddW 10100000 Slave Write EN CS 0 CS Off AlarmNum 0 Alarms on Fresh Start AlarmAdd 10 Address of First Alarm EN Alarm 0 Turn of Alarm Condition Light_EN 0 DONE 0 Busy 0 Pause 2000 GoSub Init_Clock GoSub CS_INT Main GoSub I2C_READ_TIME GoSub WaterTemp GoSub RoomTemp Pause 500 Wait 500mS for LCD to startup LCDOut fe 1 Clear LCD screen Pause 1 Wait 1 millisecond LCDOut fe 80 Move cursor to the beginning of the first line LCDOut Hour10 DEC1 Hourl DECI Min10 DECI Min1 DEC1 Sec10 secl IF AMPM 0 Then LCDOut AM Else LCDOut PM EndIF LCDOut DEC2 rtemp1 DEG LCDOut FE CO LCDOut Water Temp DEC2 wtemp1 DEG F GoTo Main EEESINTTTALIZE COLOR SENSOR FOR READING CS_INT PIR2 1 0 Clear TMR3IF 9600000000 clear flags sampdone 0 CS 50 0 Set division for 1 50 CS 51 1 CS 52 0 lt 5253 00 blue 01 clear 10 green 11 5 53 0 CS LED 0 CS_OE 1 Return oom Temp Reading RoomTemp ADCONO 00010001 Pause 10 For rsample 1 TO 20 Take 20 samples ADCIN 4 rtemp Read analog chan AN4 into rtemp var rsamples rsamples rtemp Accumulate 20 samples Pause 10
3. UNIVERSITY OF FLORIDA EEL 4914 Senior Design Final Design Report December 5 Fall 2007 Fresh Water Aquarium Monitor Team Name Finding Nemo Submitted by Mike Arms marms ufl edu 727 560 1663 Beth Spalding bethO2 ufl edu 352 870 7232 Table of Contents ll IV Vi Vil VIII IX XIII XIV INTRODUCTION ABSTRACT TECHNICAL OBJECTIVES PROJECT FEATURES CONCEPT TECHNOLOGY PRODUCT COMPARISON PROJECT ARCHITECTURE HARDWARE SOFTWARE DESIGN PROCEDURE FLOWCHARTS DIAGRAMS BILL OF MATERIALS USER MANUAL GANTT CHART RESPONSIBILITIES APPENDICIES INTRODUCTION This project has very practical applications to almost every individual who has interest in owning a fresh water aquarium or who already owns a fresh water fish aquarium For example if a family leaves their home for a week long vacation instead of trying to find someone to care for the aquarium while they are away the fish monitor will feed the fish monitor the temperature and PH levels and adjust accordingly This device will have great value for those individuals who value the health of their fresh water friends Existing commercial products are very costly and provide many features that the average aquarium owner may not use or need Commercial available features include password protection water conductivity weather simulation sunrise and sunset simulation and ORP oxidation reduction potential All
4. storage for variable run steps 0 initializes the step to zero run 0 initializes the run to zero clear clears all registers TRISD 92611110000 sets D 0 1 2 to low output and the rest high var PORTD O INI VAR PORTD 1 IN2 VAR PORTD 2 CE2 VAR PORTD 3 9600001001 9600001011 9600001111 96000001101 stepArray 0 stepArray 1 stepArray 2 stepArray 3 ee OldCap VAR WORD NewCap VAR WORD PulseW VAR WORD Red VAR WORD Green VAR WORD Blue VAR WORD T3OF VAR BYTE SampDone VAR BYTE EN CS VAR BIT pH VAR WORD 2 DONE VAR BIT RG VAR WORD Address VAR BYTE SAddR VAR BYTE SAddW VAR BYTE Secl VAR BYTE Secl0 VAR BYTE Minl VAR BYTE 10 VAR BYTE Hourl VAR BYTE 10 VAR BYTE WHour VAR BYTE WMin VAR BYTE IAMPM VAR BIT AMPM VAR BYTE AlarmNum VAR BYTE AlarmAdd VAR BYTE i VAR BYTE AMinl VAR BYTE View of Alarm Contents AMin10 VAR BYTE AHourl VAR BYTE Ahourl0 VAR BYTE AAMPM VAR BYTE AHour VAR BYTE 4 Raw Alarm Data AMin VAR BYTE 4 rHours VAR BYTE rMinutes VAR BYTE EN_Alarm VAR BIT Buttons VAR BYTE Busy VAR BIT ON INTERRUPT GoTo IntHandler INTCON 11000000 Enable global and pir interrupts INTCON 3 1 PORTB INTERRUPT INTCON 0 0 CLEAR PORTBIF 00000100 Set CCP to high priority PIE2 00000010 Enable TMR3I PIE 00000100 Enable interrupt PIR2 1 0 Clear TMR3IF 00000000 clear flags
5. 10111110 bit7 right Justified TRISE O 1 set REI ANS to input for water temp reading TRISA 00100000 _ set all of port A output for LCD set RAS ANA to input for room temp reading TRISB 0 0 B 0 is output TRISC 2 1 Input for CCP1 TRISC 7 20 TRISC 0 0 TRISC 1 20 TRISC 3 0 TRISC 4 0 TRISC 5 0 TRISC 6 0 TRISC 3 0 SCL output TRISB 1 1 TRISB 7 1 TRISB 6 1 TRISB 5 1 TRISB 4 1 2k 2k ak ak ak kk k kR temp A D Variable Definitions o 2 k rsamples VAR WORD Multiple A D sample accumulator rsample VAR BYTE __ Holds number of samples to take rtemp BYTE room temp storage rbinaryl VAR BYTE __ storage for binary value rtempl VAR BYTE DEG CON 223 write a degree mark on the LCD rsamples 0 Teese oe 2k ak ak ak ak ake ak k k k k Water temp A D Variable Definitions k wsamples VAR WORD Multiple A D sample accumulator wsample VAR BYTE _ Holds number of samples to take wtemp VAR BYTE water temp storage wbinaryl VAR BYTE __ storage for binary value wtempl VAR BYTE wsamples 0 H20Temp VAR BYTE Variable that holds set temp TempAdd VAR BYTE TempAdd 20 Address on RTC where set temp in backed up ak Motor Variable Definitions ees kk kkk ER k kk kkk k steps VAR WORD storage for the of steps stepArray VAR 4 sets the number of available arrays run VAR WORD
6. Return I2C START High SDA High SCL Low SDA Low SCL Return I2C STOP Low SDA High SCL High SDA Pause 1 Return I2C RX ShiftIn SDA SCL 0 i2c in 0 Shift in first byte MSBF ShiftOut SDA SCL 1 9000 Send ACK 0 ShiftIn SDA SCL 0 12 in 1 Shift in second byte MSBF ShiftOut SDA SCL 1 1 1 not acknowledge NACK 1 Return DC TX ShiftOut SDA SCL 1 i2c out Shift out i2c out MSBF ShiftIn SDA SCL O i2c ackM Receive ACK bit IF i2c ack 0 Then GoSub error EndIF Return I2C WRITE TIME GoSub I2C START i2c_out SAddW GoSub DC 12 out Address Start at Minutes address GoSub I2C TX Send Address 12 out WMin GoSub DC TX 12 out WHour GoSub DC TX GoSub 2 STOP Return Init Clock GoSub I2C START i2c_out SAddW GoSub DC i2c out 00 GoSub DC TX 12 00000000 Control Setup GoSub I2C_TX GoSub I2C_STOP GoSub 2 START 12 SAddW GoSub I2C_TX i2c_out 08 GoSub I2C_TX i2c out 00000000 Alarm Control Setup GoSub DC TX GoSub DC STOP GoSub 2 START Read Temp Backup i2c outZSAddW GoSub DC TX i2c_out TempAdd Start reading TempAdd GoSub DC TX GoSub 2 START i2c_out SAddR GoSub DC TX ShiftIn SDA SCL 0 i2c_in 0 Shift in first byte MSBF ShiftOut SDA SCL 1 1 1 not acknowledge NACK 1 GoSub STOP H20Tempzi2c in 0 GoSub I2C READ TIME Get Time and Alarms IF hour10 0 AND AMPM 0
7. time between two pulses is measured of one particular color and then compared to that of the other colors The ratio is used to determine the shade of the color The vial containing the water to be tested and pH chemicals will be inserted into the opening at the face of the device A diagram of the color sensor compartment can be seen in Figure X The color sensor will then take samples of the color in the vial and output the results to the LCD If the pH is out of the desired range the user can make the decision to adjust the pH of the water Enclosure Color Sensor Figure PH Sensor Enclosure with Color Sensor and Test Vial Many samples were recorded of solutions varying in pH The samples were grouped to what they appear to represent on the color chart The data was plotted and equations were calculated The red to green ratio was the best fit and most predictable This equation was implemented into the Microprocessor o O 3 4 7 7 pet j uuu 200585588050 2 1 2504 6 2334 7 R 0 992 74 5 j 2 0 6339x asoa 0 9241 62 64 66 68 7 72 74 76 78 pH R Gvs pH RBvs pH G Bvs pH Linear G B vs pH vs pH Linear R G vs pH This technology can also be adapted to testing for Ammonia Nitrate and Oxidation levels as the less advanced method of using test strips or litmus paper is the same method to test for p
8. 0 AlarmNum AlarmNum 1 EndIF until Sel IF AlarmNum 0 Then Buttons PORTB Reading PortB will update the resting state avoiding false inturrupts INTCON 0 0 Return EndIF For i 0 TO AlarmNum 1 320 1 23 Address 10 2 i 10 12 14 06 LCDOut S fe 1 Pause 1 LCDOut fe 80 LCDOut Feeding DECI i 1 Pause 1000 Convert BCD IF Amin i 0 AND AHour i 0 Then Makes previously set alarms viewable AMinl AMin i amp 9600001111 AMin10 AMin i gt gt 4 1 AHour i amp 00001111 Ahour10 AHour i gt gt 4 amp 00000011 AAMPM AHour i gt gt 6 amp 00000001 Minutes AMin1 10 AMin10 Hours AHourl 10 AHour10 IAMPM AAMPM Else Minutes 0 Default Alarm Values Hours 12 IAMPM 0 GoSub TimelInput Next i GoSub I2C START Backup the Number of Alarms i2c_out SAddW GoSub DC i2c_out 0F AlarmNum Backup Address GoSub I2C_TX Send Address 12 AlarmNum GoSub I2C_TX GoSub I2C_STOP Pause 50 Buttons PORTB Reading PortB will update the resting state avoiding false inturrupts INTCON 0 0 Enable Return error Pause 500 Wait 500mS for LCD to startup LCDOut fe 1 Clear LCD screen Pause 1 Wait 1 millisecond LCDOut fe 80 Move cursor to the beginning of the first line LCDOut ack received Display Pause 500 GoTo error Return Disable IntHandler IF pir1 2 1 AND PIE1 2 1 Then ISR PIR1 2 0 Cl
9. 20Temp H20Temp 1 EndIF GoTo set_temp EndIF IF down 1 Then Pause 50 IF H20Temp gt 65 Then H20Temp H20Temp 1 EndIF GoTo set_temp EndIF until Sel GoSub I2C_START i2c out SAddW GoSub DC i2c TempAdd Start at temperature address GoSub I2C TX Send Address i2c out H20Temp GoSub DC TX GoSub I2C STOP Pause 50 Buttons PORTB Reading PortB will update the resting state avoiding false inturrupts INTCON 0 0 Enable Return Timelnput Disable Position 2 0 LCDOut FE 0F Blinking cursor on Update Pause 200 Wait 10mS for LCD to startup LCDOut fe 1 Clear LCD screen Pause 1 Wait 1 millisecond LCDOut fe 80 Move cursor to the beginning of the first line LCDOut DEC2 Hours DEC2 Minutes IF IAMPM 0 Then LCDOut AM Else LCDOut PM EndIF IF Position 0 Then LCDOut FE 2 Return home beginning of first line LCDOut FE 14 EndIF IF Position 1 Then LCDOut FE 2 For i 1 TO 4 LCDOut FE 14 Next i EndIF IF Position 2 Then LCDOut 2 For i 1 TO 6 LCDOut FE 14 Next i EndIF Repeat IF up 1 Then Pause 50 IF Position 0 AND Hours lt 12 Then Hours Hours 1 Else IF Position 0 AND Hours 12 Then Hours 1 EndIF EndIF IF Position 1 AND Minutes lt 59 Then Minutes Minutes 1 Else IF Position 1 AND Minutes 59 Then Minutes 0 EndIF EndIF IF Position 2 AND IAMPM 0 Then IAMPM 1 EndIF GoTo Update
10. 9000 Send 0 ShiftIn SDA SCL 0 i2c_in 1 Shift in second byte MSBF ShiftOut SDA SCL 1 9000 Send ACK 0 ShiftIn SDA SCL 0 i2c in 2 Shift in first byte MSBF ShiftOut SDA SCL 1 1 1 not acknowledge NACK 1 GoSub I2C_STOP rMinutes i2c_in 1 raw time data rHours i2c_in 2 secl i2c in 0 amp 00001111 LCD viewable Time Format 10 i2c_in 0 gt gt 4 Minl 12c_in 1 amp 00001111 Min10 i2c_in 1 gt gt 4 Hour i2c in 2 amp 9600001111 10 i2c_in 2 gt gt 4 amp 9600000011 AMPM 12 in 2 gt gt 6 amp 00000001 IF AlarmNum 0 AND AlarmNum lt 5 Then GoSub 2 START Read Alarms i2c_out SAddW GoSub I2C_TX i2c_out 10 AlarmAdd GoSub I2C_TX GoSub I2C_START i2c_out SAddR GoSub For i 0 TO AlarmNum 1 0 1 2 3 ShiftIn SDA SCL 0 Amin i Shift in AMinutes from ADDR 00 02 04 6 ShiftOut SDA SCL 1 0 1 0 ShiftIn SDA SCL 0 Ahour i Shift in MHour from ADDR 01 03 05 07 IF 1 AlarmNum 1 Then Send ACK if more to read ShiftOut SDA SCL 1 7000 Send ACK 0 if more data to get EndIF Nexti ShiftOut SDA SCL 1 1 1 not acknowledge NACK 1 GoSub 2 STOP For i 0 TO AlarmNum 1 IF rHours Ahour i AND rMinutes AMin i AND 0 AND 10 0 Then GoSub FishFeed EndIF Next i EndIF IF H20Temp WTempl Then Light ENZ1 Else Light 0 EndIF
11. EndIF IF down 1 Then Pause 50 IF Position 0 AND Hours gt Then Hours Hours 1 Else IF Position 0 AND Hours 1 Then Hours 12 EndIF EndIF IF Position 1 AND Minutes gt 0 Then Minutes Minutes 1 Else IF Position 1 AND Minutes 0 Then Minutes 59 EndIF EndIF IF Position 2 AND IAMPM 1 Then IAMPM 0 EndIF GoTo Update EndIF IF Left 1 Then Pause 50 IF Position 1 Then Position 0 Else IF Position 2 Then Position 1 Else IF Position 0 Then Position 2 EndIF EndIF EndIF GoTo update EndIF IF Right 1 Then Pause 50 IF Position 1 Then Position 2 Else IF Position 2 Then Position 0 Else IF Position 0 Then Position 1 EndIF EndIF EndIF GoTo update EndIF until sel 1 LCDOut FE 0C WHour Hours 10 lt lt 4 Hours 10 lt lt 6 2610000000 WMin Minutes 10 lt lt 4 Minutes 10 GoSub I2C WRITE TIME Pause 50 Buttons PORTB Reading PortB will update the resting state avoiding false inturrupts INTCON 0 0 Enable Return SetAlarms Disable Pause 50 LCDOut fe 1 Clear LCD screen Pause 1 Wait 1 millisecond LCDOut fe 80 Move cursor to the beginning of the first line LCDOut How Many Feedings Repeat Wait for Select Pause 200 LCDOut fe 0 LCDOut AlarmNum IF up 1 AND AlarmNum 4 Then Pause 50 AlarmNum AlarmNum 1 EndIF IF down 1 AND AlarmNum gt 0 Then Pause 5
12. H These elements will obtain a certain color depending on the level of each in the water and the color sensor can be programmed to identify the range for those elements Stepper Motor A stepper motor is an electromechanical device that rotates in discrete angular steps The angle of rotation is dependent on the sequence of pulses applied at the input It has very precise control and is ideal for this situation because the fish feeding mechanism needs precise and limited rotation We are using the 20M020D1B bipolar two phase stepper motor which has 18 of precision meaning each step it rotates 18 In conjunction we are also using a FAN8200 low voltage stepping motor driver The device we built to contain the fish food and dispense it to the fish tank has four compartments with dividers located 90 apart This means we need 90 18 5 steps in order to rotate enough to dispense the food The first figure is a drawing of the feeding mechanism There is a food reservoir that holds the food until the dispenser is rotated After the stepper motor rotates the dispenser gravity brings food into the next empty compartment Food Reservoir Stepper Food Dispenser Motor 90 degree compartment separation Figure Feeding Mechanism A certain sequence is required in order to power the stepper motor A signal is sent from the PIC through the driver and then the output to the driver moves the stepper motor The driver is basically two logic
13. RDWARE SOFTWARE PIC Microcontroller We chose to use the PIC18F4620 because it is the largest one available with a wide range of features required for our design Operating voltage 2 0V to 5 5V Internal real time clock and oscillator 10 bit ADC 13 channels at 100K samples per second Program Memory 65536 bytes RAM size 3968 bytes EEPROM data size 1024 bytes JO pins 36 40 Pin PDIP MCLR VSE RE2 1 40 R87 8i2 PGD RAD ANO 2 39 RB8 K8i2 PGC RAT ANT 3 4 7 RB5 KBIT PGM RA2 AN2 VREF ICVREF 4 RB4 KBID AN11 RAS AN3 VREF 5 J RB3 AN9 CCP2l RA4 TOCKI CTOUT gt la R82 INT2 ANE RAE ANA SSIHLVDIN C2OUT 7 RB1 NT1 AN10 REO RD ANS 8 RE1WR AN6 RE2 CS AN7 VDD vss ROD7 PSP7 P1D RDG PSPS P1C PIC18F4525 PIC18F4620 OSCI CLKURA7 OSC2 CLKO RAB RCO T1OSO T13CKI RCiTIOSUCCP2U 4 RC2 CCP1 P1A gt 1 RC3I SCK SCL 18 o gt e gt RD2 PSP2 Figure PIC18F4620 Pin out LCD Display The LCD display provided in the senior design class was very basic and provided two lines with twenty characters each which is sufficient for our design PH Test Vial Select Buttons LCD Screen Device Front Panel Figure 20x2 LCD Scree
14. Then Set up RTC on fresh start GoSub I2C START i2c_out SAddW GoSub I2C_TX i2c_out 04 GoSub I2C_TX 12 10010010 Set default time to 12 00AM GoSub DC GoSub 2 STOP GoSub I2C START i2c out SAddW GoSub DC TX i2c out 0F Start at AlarmNum and clear everything GoSub DC TX 12 out 00 GoSub DC TX AlarmNum GoSub DC TX 1 GoSub TX GoSub DC TX A2 GoSub DC TX GoSub DC TX GoSub DC TX GoSub TX 4 GoSub DC TX GoSub I2C STOP GoSub I2C START i2c_out SAddW GoSub i2c out TempAdd Start temperature address GoSub I2C_TX Send Address i2c_out 70 GoSub DC GoSub 2 STOP EndIF AHour 0 AHour 2 AHour 3 AMin 0 AMin 1 AMin 2 AMin 3 Alway clear unknown memory contents on PIC boot GoSub I2C START Read AlarmsNum backup 12 outzZSAddW GoSub DC TX i2c_out 0F Point to AlarmNum backup Address GoSub DC TX GoSub I2C START Repeat Start to read 12 outzSAddR GoSub DC TX ShiftIn SDA SCL 0 AlarmNum Shift in first byte MSBF ShiftOut SDA SCL 1 1 1 not acknowledge NACK 1 GoSub DC STOP Return Set Temp Disable Pause 200 Wait 10mS for LCD to startup LCDOut fe 1 Clear LCD screen Pause 1 Wait 1 millisecond LCDOut fe 80 Move cursor to the beginning of the first line LCDOut Water Temp DEC2 H20Temp DEG F repeat IF up 1 Then Pause 50 IF H20Temp 90 Then H
15. Wait 10ms per loop Next rsample rtemp rsamples 20 divide by of samples rbinaryl rtemp store the number into the binary storage rtempl rtemp 500 gt gt 2 rsamples 0 Clear old sample accumulator Pause 75 Return Teese ake ake ake kk ya tery Temp Reading LOOP WaterTemp ADCONO 00010101 Pause 10 For wsample 1 20 Take 20 samples ADCIN 5 Read analog chan ANS into wtemp var wsamples wsamples wtemp Accumulate 20 samples Pause 10 Wait 10ms per loop Next wsample wtemp wsamples 20 divide by of samples wbinaryl wtemp store the number into the binary storage wtempl wtemp 500 gt gt 2 wsamples 0 Clear old sample accumulator Pause 75 Return ree Get Color Sample TETE FE REEE GetSample PIR2 1 0 Clear TMR3IF 9600000000 clear flags pie2 1 1 Turn on TMR3I PIE1 2 1 on CCPI Done 0 LCDOut fe 1 Pause 1 LCDOut fe 80 LCDOut pH While Done Wend GoSub DisplayColors Buttons PORTB _ Reading PortB will update the resting state avoiding false inturrupts INTCON 0 0 Return Display Colors o 2 E GE GE GE GER SE SE SE SE So osse oe k K k K K DisplayColors LCDOut fe 1 Clear LCD screen Pause 1 Wait 1 millisecond LCDOut fe 80 Move cursor to the beginning of the first line LCDOut Red dec5 Red
16. ear CCPIIF OldCap 2 NewCap NewCap lt lt 8 CCPRIL PulseW Newcap oldcap GoTo exitint2 EndIF IF PIR2 1 1 AND PIE2 1 1 Then ISR pir2 1 0 TMR3IF IF 0 Then CS 52 0 lt 253 00 blue 01 clear 10 green 11 5 53 0 5 0 IF SampDone 0 Then Red 0 Blue 0 Green 0 EndIF EndIF IF 1 Then CS_S2 0 5253 00 blue 01 clear 10 green 11 CS_S3 1 CS_OE 0 EndIF IF 2 Then CS 52 1 lt 5253 00 blue 01 clear 10 green 11 CS 93 1 CS_OE 0 EndIF IF T3OF 1 Then red PulseW Red EndIF IF 2 Then Blue PulseW Blue EndIF IF 3 Then Green Pulsew Green EndIF IF t30f 3 Then sampdone 1 Then PIE1 2 0 off CCP1 PIE2 1 0 turn of TMR3I SampDone 0 0 Red Red Green Green Blue Blue CS_OE 1 DONE 1 Else tof 0 sampdone sampdone 1 EndIF Else Bof t30f 1 EndIF GoTo exitint2 EndIF 4 4 TIME ALARM Color IF INTCON 0 1 AND Busy 0 Then Buttons PORTB Buttons Buttons gt gt 4 INTCON 0 0 IF Buttons 00000001 Then right Pause 200 GoSub fishfeed GoTo exitint EndIF IF Buttons 00000010 Then left Pause 200 GoSub GetSample GoTo exitint EndIF Buttons 00001000 Then up Pause 200 Busy 1 GoSub options Busy 0 GoTo exitint EndIF IF Buttons 00000100 T
17. en the fish will be fed at what temperature the water should be kept and the required PH levels It will a provide feedback of the current levels and adjust the temperature accordingly if the levels are out of the specified user input TECHNICAL OBJECTIVES This project will use basic DC wall power There will be a temperature sensor to monitor the water and another sensor to measure the pH The pH levels can be adjusted at the user s discretion while the temperature will be corrected automatically A step motor will be used to dispense food A microprocessor will take in the data from the sensors and output the data to an LCD screen The user will input the range of acceptable conditions of the aquarium as well as the desired number of feedings per day on a keypad IV PROJECT FEATURES In order to minimize cost and facilitate ease of use this product will have the necessary but minimal features Main Objective Our goal is to market this product to the average aquarium owner so a basic user friendly product is a must Features LCD Display this part of the device will be used to enter user defined inputs for temperature pH and fish feeding time through basic push buttons and display the current temperature and pH levels Push Button Input minimal push buttons will be used as the means for entering the desired data e Temperature monitoring and control the device will monitor the temperature of the aqua
18. flip flops or four inverters The motor is energized in full step mode meaning two phases can be energized at a given time A diagram of the driver and the input and output sequences required to power the motor 15 shown below Once the entire device is set up on the fish tank with food in the food reservoir the motor will need to rotate the dispenser once in order for the food to be on either the 0 or 180 mark this way once the set time is reached to feed the fish the food will dispense properly CE1 8 CE2 INPUT OUTPUT IN1 o IN2 NI CE1 amp CE2 o Figure Stepper Motor Driver and Input and Output Sequence IX DESIGN PROCEDURE Once we came up with an idea for a project we brainstormed about features and hardware we would need to implement the task Since we knew what features we wanted temperature and pH sensing automatic feeding and a basic user interface we researched available options for these features We decided on each hardware device based on the project needs We chose the PIC 18F4620 after adding up the I O pins we would need we originally calculated around 20 I O pins and ended up using all but two of the pins We chose the LM34 temperature sensor because of its ease of use and the fact that the output voltage is linear to the Fahrenheit We chose a stepper motor for the fish feeder because it has very precise control After doing extensive research on pH sensors we f
19. gn Breadboard Preliminary Assembly Programming Preliminary Debug MIL PCB Debug Testing Packaging Fine Tune Project Report Final Presentation Mike OBeth OBoth RESPONSIBILITIES At the beginning we had alternately divided up the responsibilities As the semester went on we divided up the responsibilities based on strengths and weaknesses Since Mike had the most programming knowledge and experience he was responsible for programming the color sensor real time clock and user interface for the device He was also responsible for the physical assembly of the feeder and installing the LCD and buttons for the enclosure Because Beth has a less diverse programming background she was responsible for programming the temperature sensors and the motor for the fish feeder She was also responsible for soldering the components to the PCB board and the majority of the writing Mike 1 Programming Color Sensor Real Time Clock User Interface 2 Protel 3 Mechanical Beth 1 Programming Temperature Sensor Stepper Motor 2 Soldering board XIV APPENDICIES LLLLLLLLLLLLLLLLLLLLLLLLLLLLELLDLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL Name FishMonitor 3 Author Mike Arms Beth Spalding T Notice Copyright c 2007 E All Rights Reserved Date 10 9 2007 Version 1 0 Notes d DEFINE LCD_DREG PORTA LCD data port DEFINE LCD DBIT 0 LCD data start
20. hen down Pause 200 Busy 1 GoSub set_temp Busy 0 GoTo exitint EndIF GoTo exitint match options Pause 10 Wait 10mS for LCD to startup LCDOut fe 1 Clear LCD screend Pause 1 Wait 1 millisecond LCDOut fe 80 Move cursor to the beginning of the first line LCDOut lt Clock Feedings gt Display LCDOut fe cO Move cursor to the beginning of the second line LCDOut Select to Exit Pause 250 repeat IF right 1 Then Set Feeding Alarm Pause 50 GoSub SetAlarms GoTo endoptions EndIF IF left 1 Then Set Clock Pause 50 Address 03 Minutes Min1 10 Min10 Hours Hourl 10 Hour10 IAMPM AMPM GoSub TimelInput GoTo endoptions EndIF until sel endoptions Return EndIF exitint Pause 500 Buttons PORTB INTCON 0 0 exitint2 Resume Enable
21. ing bit 0 or 4 DEFINE LCD RSREG PORTA register select port DEFINE LCD RSBIT 4 register select bit DEFINE LCD EREG PORTPB LCD enable port DEFINE LCD EBIT 3 LCD enable bit DEFINE LCD BITS 4 LCD bus size 4 or 8 DEFINE LCD LINES 2 Number lines on LCD DEFINE LCD COMMANDUS 2000 Command delay time in us DEFINE LCD DATAUS 50 Data delay time in us DEFINE HSER RCSTA 90h DEFINE HSER TXSTA 20h DEFINE HSER_BAUD 9600 DEFINE HSER SPBRG 6 DEFINE HSER_CLROERR 1 CS 50 VAR 0 CS 51 VAR PORTC 1 CS INPUT VAR PORTC 2 CS S2 VAR PORTA 6 CS S3 VAR PORTA 7 CS OE VAR PORTC 5 CS LED VAR PORTC 6 ALERT VAR 0 LIGHT EN VAR PORTC 7 SDA VAR PORTC 4 SCL PORTC 3 i2c_read CON 1 i2c_write CON 0 12 VAR BYTE i2c_in VAR BYTE 6 12 VAR BIT temp VAR WORD UP VAR 7 DOWN VAR 6 LEFT VAR 5 RIGHT VAR PORTB 4 SEL VAR PORTB 1 Position VAR BYTE Hours VAR BYTE Minutes VAR BYTE OSCCON 01100010 CCPICON 00000101 Capture on rising edge T3CON 10000001 T1CON 10001001 A D creed o TREE RM Ke diea DEFINE ADC BITS 10 Set A D for 10 bit operation DEFINE ADC_CLOCK 3 Set A D clock DEFINE ADC SAMPLEUS 50 Set A D sampling time 50 uS 76543210 00001000 ADCONI A D control reg 1 bit3 0 2 0010 A D port config ANO ANO analog bit4 0 VREF VDD bit5 0 VREF VSS
22. n and Device Front Panel Real Time Clock We used the PCF8583 to keep track of time and to store memory that needed a battery back up Temperature Sensor Since we wanted to display the temperature in Fahrenheit the LM34 temperature sensor was the most feasible solution It was very inexpensive and widely available The output voltage of the sensor is linearly proportional to the Fahrenheit temperature on a 10 0mV F scale has a range of 50 F to 300 F range has low self heating and does not require any outside calibration or programming conversions to obtain the correct value The figure below shows the configuration for a basic temperature sensor and its corresponding current and temperature curve For the basic configuration without using any resistors the temperature range stops at 0 F which is sufficient because the temperature of the fish tank is not expected to drop below 65 F 160 120 w 100 8 Vs 60 4 TO 200 40 gt ie Vout 7 10 0 0 100 0 100 200 300 TEMPERATURE F Basic Fahrenheit Temperature Sensor Quiescent Current vs Temperature Figure LM34 Fahrenheit Temperature Sensor DIP and Curve PH sensor The TCS230 was used to read the color of the pH from a standard liquid test kit The color sensor outputs a PMW signal that is read by the microprocessor As the intensity of the red green or blue light increases the pulse widths get smaller The
23. of these features are excess for the average owner Costs range anywhere from 150 upwards to 400 more than an owner would want to pay if their aquarium only cost around 50 Our product will minimize cost and provide only the basic features needed to successfully monitor and maintain a fresh water aquarium Il ABSTRACT This project was realized over the summer when a close friend received a fresh water aquarium as a gift One afternoon the fish were found with small white spots all over them It turned out to be a bacterial infection and something that could have easily been prevented if the water temperature was kept between a certain levels Project Finding Nemo aims to monitor and control the temperature PH levels and feed the fish in a fresh water fish aquarium The temperature will be monitored using a basic temperature sensor and the temperature adjustment will be performed by turning on or off alight The PH levels will be monitored using a color sensor and the levels will be adjusted according to the user s discretion The technical challenges this team will face is programming the monitor for temperature and PH and working with the color sensor Typical PH sensors are difficult to work with and on average last only a year At the end of the term this outcome we expect is to build a working aquarium monitor to monitor the temperature and PH levels within the tank The device will be able to store user input as to when and how oft
24. ound a new approach to testing the pH using a color sensor Later in the semester we also realized that the color sensor could also be adapted to test for Ammonia levels Nitrate levels and other chemicals typically adjusted in aquariums We used a separate real time clock due to its stability Once we received all the parts we split the responsibilities between the two of us and programmed on two breadboards That way each individual was in charge of certain aspects of the project and if one of the breadboards or one of the components on the board failed we wouldn t have to move the entire project to a new board or risk damaging other components For the enclosure we chose materials that were easy to work with The plastic housing was purchased for a local retailer and was easy to drill and cut holes for the components We used balsa wood for the rotating portion of the feeder once again because it was easy to shape A basic funnel was the container to hold the fish food X Flowcharts amp Diagrams PIC Microcontroller 120 VAC Relav pH Sensor Temperature Sensor X BILL OF MATERIALS Price per P N Amount Each Total PIC Microcontroller 18F4620 1 10 20 10 20 Temperature Sensor LM34 2 52 51 55 02 Color Sensor TCS230 LM 1 59 95 59 95 RTC 8583 1 2 48 2 48 Transistor 2N3189 1 50 75 50 75 Diode 1N4148 4 0 10 0 40 Cap 0 1 uf 5 0 25 1 25 Ca
25. p 0 47 uf 1 0 20 0 20 Cap electrolytic 33uF 1 0 12 0 12 Resistor 10K 2 0 30 0 60 Resistor 4 7k 3 0 30 0 90 Resistor 1K 1 0 80 0 80 Motor 1 19 60 19 60 Relay OUZ SS 105D 1 1 15 1 15 Fuse 1 2 87 2 87 LCD 1 10 00 10 00 Motor Driver FANS200 1 0 80 0 80 Crystal Oscillator S591 1 1 16 1 16 Potentiometer 6P320K 1 3 00 3 00 Total Cost 121 25 This cost 121 25 is in the range between the two lowest priced competing products The color sensor was the most expensive part in this design If we had decided to use the more common sensor the cost would be cut significantly but the pH leads would have to be replaced often which would increase the price over time The product with the color sensor might be more expensive but it requires little to no maintenance and can be kept in full working condition for years USER MANUAL XIII Gantt Chart Task Name Mike Beth Both Project Research 0 0 0 1 5 1 5 Preliminary Design Report 1 0 2 0 3 Order Parts 2 2 0 0 4 Circuit Design 4 0 0 3 7 Breadboard Preliminary Assembly 4 0 0 25 6 5 Programming 5 0 0 4 9 Preliminary Debug 6 0 0 2 8 MIL PCB 7 1 0 0 8 Debug Testing 7 0 3 0 10 Packaging 9 1 0 0 10 Fine Tune Project 9 0 0 2 11 Report 11 0 2 0 13 Final Presentation 12 0 0 1 13 Available Weeks in Fall 2007 Project Research Preliminary Design Report Order Parts Circuit Desi
26. pulse will rotate the motor by a predefined increment in a step fashion and has a high degree of precision By using the step motor we will be able to control precisely how much food we want to feed the fish and while using minimal power unlike other types of motors VI PRODUCT COMPARASION After deciding on this design product we researched to see if there were any comparable existing products We can see from the monitors introduced below that they are not only expensive but have many more features than the average aquarium owner would need Digital Aquatics ReefKeeper 2 AquaDirect Link Features fully enclosed stand alone device PH monitor interface with PC several channels different modes timers wavemaker digital thermometer and temperature control fan chiller control high power Cost 49 00 AquaController Jr 3 and 3 Pro Neptune Systems Link Features fully enclosed stand alone device This device includes pH Temperature ORP Cond and DO monitoring and control Ethernet port e mail alarms telnet server lighting control wavemaker seasonal variations digital calibration a picture of each device is shown below Cost 149 95 to 649 95 AquaController 111 k AquaController Jr Neptune Systems eov Vil PROJECT ARCHITECTURE PCB Schematic Project Architecture A high level description of how the parts in your project work together Vill HA
27. re sensors available that easily interface with the PIC Microcontroller We chose a Fahrenheit temperature sensor because converting to Kelvin or Celsius with the PIC loses some accuracy in the decimal place PH sensor PH sensors test how basic or acidic the liquid is and can be translated into a concentration of hydrogen ions The measurement ranges between 0 and 14 A very acidic solution has a low pH value from 0 to 2 corresponding to a large concentration of hydrogen ions A basic solution has a high pH value from 12 to 14 corresponding to a small number of hydrogen ions It is important to note that over time the electrical properties in the pH measuring electrodes change so the electrode will eventually have to be replaced This makes typical pH sensors unfavorable to use We chose to use a color sensor instead of the more common pH sensors because of its wide range of uses consistent readings and the fact that it will not need to be replaced unlike basic pH sensors The current method for testing the pH is adding the appropriate chemicals to a small vial of the aquarium water and then inserting it into the pH testing device where the color sensor reads the intensity of the water color in the vial and displays the results on the LCD The color sensor could also be adapted to test for ammonia and nitrate levels Stepper Motor The stepper motor is ideal for feeding the fish A stepper motor will run after a pulse of electricity and this
28. rium and then display the temperature of the aquarium and if the temperature is out of the user specified range the device will turn on off a lamp to adjust the temperature e PH monitoring the device will monitor and display the current pH readings and notify the user if the pH is out of the user defined range e Fish feeder the device will contain a step motor with rotating cavity to provide food to feed the fish At the user defined time the motor will dispense the food to the aquarium V CONCEPT TECHNOLOGY PIC Microcontroller We chose the PIC over other controllers based on the wide array of features available which are appropriate for the needs of this project It is widely available has a very low cost wide range of available development tools and the availability of a real time clock It has a variety of features including a CPU RAM ROM I O lines and can store and run a program LCD Display A basic LCD display will interface with the PIC Microcontroller in order to display the information pertaining to the temperature and pH sensors Real Time Clock We chose to use a separate Real Time Clock instead of the one on the PIC Microcontroller because it is more stable than the PIC It is more accurate and will not fluctuate with a change in load Temperature Sensor This sensor will take analog temperature data and then convert the value to a digital format through the use of the microcontroller There are many temperatu
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