DesignTek Enterprises
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1. Against water immersion for 30 minutes at a depth of 1m e GPS High Sensitivity Chipset e Accepted Data Card micro SD Card Page 5 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition e Mini USB Connection Interface e Wireless Interface 2 4 GHz ANT e Rechargeable Lithium Battery Max 15 hours usage e Barometer amp Digital Compass e All displays are in English 17 optional languages The bad there are issues transferring data to and from the bike computer because of file formats Everything needs to be created with the Byron software available online and cannot be used with other Training software The Bryton Rider 50 also costs anywhere from 360 to over 400 dollars depending on where you purchase it from Concept Technology Selection The Xtreme Chariot RDX4398 Pro Limited Edition is based on a popular paradigm for cycling data collection A sensor unit attaches to the frame or fork and communicates information to a head unit placed on the handlebars The product uses a common method for measuring the angular rotation of the wheel by passing a magnet over a Reed switch which drives an input to a microprocessor This microprocessor calculates the rotational velocity and communicates the information over Bluetooth to the head unit The hardware chosen for the task is the Bluetooth SMD Module Rayson BTM 182 which is well documented by Sparkfun Bluetooth was chosen because it presents a common and well tested interfac2. When biking in the sun it will charge the lithium ion battery within the head unit Heart Rate Monitor Also included in the head unit with be a heart rate receiver device When wearing the Polar transmitter chest strap your heart rate will be monitored continuously and updated every few seconds onto the LCD screen Page 4 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Analysis of Competitive Products There are numerous bike computers on the market today for cyclists to buy that include a few features we have included in our product The following describes 3 of those bike computers Garmin Edge 305 e Rugged lightweight Edge attaches easily to the stem or handlebars of your bike with the included bike mount e Edge 305 automatically measures your speed distance time calories burned altitude climb and descent and records this data for your review e High sensitivity GPS receiver tracks your position even in tree cover and canyons making it extremely reliable for distance and speed information e Virtual Partner lets you race a virtual competitor over a specified distance and speed e Courses let you race against a previously recorded workout so you can compare your current and past performances over the same ride e Auto Pause pauses the timer when you slow down or stop and resumes when you speed up again so you can focus on your ride e Auto Lap automatically starts a new lap each time you pass
3. low and is rechargeable and is recharged using Solar must be charged Simply turn onthe Energy Charging will power button located on the front occur best in direct sunlight It s recommended to charge labeled CHARGE The Red LED will before you ride turn off when the battery is charged STEP Problems Thank you for purchasing the If at any point you have a question about f Operating your bike computer or something has Xtreme Chariot RDX 4398 Stopped working please call us at PRO Limited Edition 1 800 DESIGNT A A aA a En Y LH BAW L Page 12 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Bill of Materials Table 2 BOM Cost of Entire Project am a I Serial Graphic LCD 128x64 1 34 95 IC Hall Effect Sensor LN 4 SIP 16 95 IC Bus TRANSCVR 4 Bit Dual 16QFN V UO o o IC REG LDO 1 8V 0 25A 6SON Antenna Chip 2 4GHZ Kemet Multilayer Ceramic Capacitors 30pF Thick Film Resistors SMD 1 8watt 1Kohms 5 Carbon Film Resistors Through Hole 1 OHM IC MCU 16 Bit 256KB Flash 113BGA Multilayer Ceramic Capacitors MLCC 2 2pF Thick Film Resistors SMD 47K 1 Multilayer Ceramic Capacitors MLCC 1uF Multilayer Ceramic Capacitors MLCC O 1uF Page 13 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition 0 72 Multilayer Ceramic Capacitors MLCC 0 01uF Rocker Switch LiPo Charger Basic Micro USB 4 4s Volt 80
4. DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Kristina Bagnell Megan Podsiad and Adam Vaughn Abstract The Xtreme Chariot RDX4398 Pro Limited Edition project consolidates a variety of data valuable to a cyclist within arm s reach The product attaches two light units on the bicycle fork and handlebars A sensor on the wheel provides measurement of speed and acceleration while the head unit tracks trip and total distance as well as GPS position information The system not only provides immediate information to the user but also provides wireless Bluetooth capabilities which can be transferred to a personal computer It is easy to setup and allows the rider to focus on riding At a basic level soeed and acceleration are measured by monitoring a spoke mounted magnet over time A small microprocessor reads this signal and sends the rotational speed of the wheel wirelessly over Bluetooth to the handle bar mounted head unit The solar powered head unit monitors the data being sent from the wheel to track distance and acceleration The head unit also contains a GPS receiver to track position The information calculated by the unit is both displayed on an LCD and transferred wirelessly via Bluetooth for later retrieval on a PC The goal of this project is to produce a device which demonstrates valuable functionality to a cyclist The product incorporates a number of features any one of which alone would be a saleable product Al
5. Strap Polar T31 Non Coded Handlebar Module Transmitter Power Head Unit 3 7V Lithium lon N Heart Rate Receiver Battery gt 3 6 5 5V 30mA Se gt Er Switch 20 Channel EM 406A Serial On Off eria f Satellites RE SiRF III Receiver with To Antenna 5V 44mA Breakout 5V Board 5V Serial Graphic LCD 128x64 34 95 MAX1771 6 7V 220mA circuit Stepup 6V Figure 3 Power Board Diagram Handlebar Module Chest Strap Polar T31 Non Coded Bluetooth Processor Transmitter Head Unit Heart Rate Receiver 3 6 5 5V 30mA 20 Channel EM 406A Processor SiRF III Receiver with MSP430F5436 Antenna 5V 44mA Serial Graphic LCD 128x64 Bluetooth SMD Module 6 7V 220mA Rayson BTM 182 Bluetooth SMD Module from Sensor Unit Figure 4 Head Unit Processor Diagram Page 9 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition RDX4398 PRO Edition Software Flowchart Bluetooth 4 GPS Start Interrupt Interrupt Read NMEA js Read Angular Velocity from Longitude Latitude etc Bluetooth Store Data to Sensor Buffer Store Data to GPS Buffer Heart Rate Interrupt Store DEJE ALO HR Buffer Get Write Transmit to Content Heart Rate ela Content Buffers to LCD Figure 5 Software Flowchart Page 10 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Separation of Work Table 1 Specific Roles for the Project Kristina Megan Adam _
6. Testing Debuggin Testing Debuggin Schematic PCB Components on Breadboard Schematic PCB Board Schematic PCB Schematic PCB GPS Initialization Software Assembled Power Board Additional GPS Software Soldering PCB boards LCD Initialization Software Interrupt Software Testing Debugging Soldering Testing Debugging Components on Power and Components on Head Unit Head Unit PCB PCB Design Solar Panel Battery Charger Testing Debugging Heart Rate Software Components on Power amp Head Unit PCB Soldering Testing Debugging Components on Sensor PCB Bluetooth Software Heart Rate Software Bluetooth Software ord EON ina Bluetooth Software Oral Presentation Presentation Oral Presentation amp Final Bik A Bike C ter A bl ike Computer Assembly Ro arna presentation ike Computer Assembly Final Hardware Final Hardware Bike C ter A bl Testing Debugging PE nen Testing Debugging Final Software Final Hardware Final Software Testing Debugging Testing Debugging Testing Debugging Page 11 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition User s Manual STEP 1 Mount your bike computer onto your handlebars Turn on the power switch on the front of the bike computer labeled POWER Allow at least 2 3 minutes for GPS and Heart Rate startup Once the values on the LCD update you are ready to ride STEP 2 When the Red LED turns on this Please note Your battery indicates that your battery is
7. a specified location or travel a preset distance The bad while pairing with the heart rate and cadence sensors it consumes a lot of battery The maximum battery life is 5 hours so you can t use the Edge 305 for long rides Also the software is nowhere near as good as the Polar software for recording training activities The bike computer does not allow for easy additional route setup you can only ride routes on the bike computer that you ve rode before The Edge 305 is also pricey starting at 350 Vetta Solar Flare The buttons have been eliminated from the face bike computer and you press the face down on the upper portion of the display to activate the rear mounted button and cycle through the functions It has the following features Soeed Soeed Comparator Trip Distance Cumulative Odometer Ride Time 12 24 Hour Clock Solar Powered Dual Bike Memory EZ Tire Setup and Service Timer The Solar Flare is cheap and you get what you pay 20 for The bad This bike computer has the basic features For an advanced cyclist one might want to monitor their heart rate and use the GPS for mapping trails Bryton Rider 50 GPS Bike Computer w Heart Rate Cadence This bike computer has 33 options for display information and includes the following features e Training Options 6 modes Fitness Simple Advanced Zone Based Interval Lap e 2 2 Color Transflective TFT Display e Preloaded Detailed Maps POls and Bike Routes e Waterproof IPX7
8. e for wireless data transmission The head unit contains the GPS unit LCD Heart rate receiver Bluetooth and the main MSP430f5436 processor The head unit processor will receive via Bluetooth the current rate of revolution from the sensor and use the information to generate ride statistics such as speed and distance traveled The Bluetooth within the head unit will transfer information from the microprocessor buffers to a Bluetooth enabled PC when within range The GPS capability is included as it demonstrates a useful product to cyclists that want to track their rides The LCD display is designed to provide as minimal and simple an interface as possible in order to avoid distracting the rider The Heart rate receiver provides the cyclist with clear readings of their heart rate on the display for fitness purposes and tracking their development as a rider The Polar transmitter was chosen for its slim lightweight and elastic chest strap It is worn snugly and comfortably below your chest muscles which allows for accurate transmission of heart rate data to the receiver Project Architecture Solar Battery Charger When the solar panels are placed in direct sunlight they will begin charging the battery The solar cells within the panel are also known as photovoltaic which convert sunlight directly into electricity The photovoltaic cells are made of semiconductors most likely silicon When sunlight strikes the solar cell a portion of it is absorbed
9. ma CIS Solar Cell sso IS 577 03 473 07 Gantt Chart 1 14 1 29 2 13 2 28 3 15 3 30 4 14 4 29 Research Project Ideas Hardware Research Parts a Order LCD GPS Order Bluetooth Chip Research Software DE En Begin Developing Write Test LCD Submit PCB boards Write Test GPS Plan Write Test HRM Develop Research Solar Deploy Order Solar Panels amp a Write Test Bluetooth Write Test SD MMC Test Debug Power Test Debug Head Test Debug Sensor Final Report amp Bike Computer Check if Bike Oral Presentation E Final DEMO Figure 7 Gantt Chart Reflecting Timeline of Overall Project Page 14 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Appendices Big Thanks to the following Technologies Inc For Sponsoring our Senior Design Project We appreciate it greatly Page 15 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Page 16 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Page 17 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Page 18 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Page 19 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition rage 20
10. microprocessor The unit will be mounted on the bike handlebars The device will track the total distance which will be immediately displayed on the LCD via Bluetooth The data stored within the buffers can be transferred via Bluetooth to your PC at home for results viewing GPS The GPS receiver will be within the head unit This will allow the Xtreme Chariot RDX4398 Pro Limited Edition to track one s position on a bike ride The signal to the GPS will be received from satellites The time date longitude latitude altitude number of satellites and position are all displayed on the LCD for the cyclist to view LCD The LCD will be part of the head unit on the handlebars It will display the time the date your speed longitude latitude your heart rate altitude number of satellites you are using and if your position is fixed on the GPS The display will be on once the power switch is in the ON position Bluetooth There will be two Bluetooth devices used one on the magnet sensor board and one in the head unit The sensor board s Bluetooth device will communicate to the head unit so that the processor can store the distance and speed information into buffers which will then be displayed onto the LCD The head unit Bluetooth device will also be able to communicate with your PC s Bluetooth adapter so you can view your results at home Solar Battery Charger We will have two 4 5V 80mA solar panels attached to the handlebars of the bicycle
11. nsor A sensor unit is attached to the frame or fork The unit uses a common method for measuring the angular rotation of the wheel by passing a magnet over a Reed switch which drives an input to the MSP430f5436 The microprocessor calculates the rotational velocity and communicates the information over Bluetooth to the head unit processor attached to the handlebars The LCD displays your speed and distance based on the information received and calculated by the processor Refer to Figure 2 Head Unit Refer to Figure 4 for Hardware information and Figure 5 for software information GPS When the bike computer is placed outside the GPS receiver module picks up satellite signals The module is preprogrammed to output NMEA commands Out of the six types of commands we chose GGA and RMC The RMC or Recommended Minimum Specific and GGA or Global Positioning System Fixed Data commands each output strings which include twelve and fifteen fields respectively Each field is separated by a comma until the end of message termination We chose nine of those fields to be displayed on the LCD UTC time Latitude N S Indicator Longitude E W Indicator Number of Satellites Altitude Position Fixed and date The GGA and RMIC output messages were parsed so that each field could be displayed in its designed section of the display LCD The LCD is designed to read and display data from the MSP430f5436 within the head unit The data is sent from the buffers
12. though the initial manifestation of this project is conceptual its components form a basis for practical devices DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Table of Contents Project Features Objectives Analysis of Competitive Products Concept Technology Selection Project Architecture Flowcharts amp Diagrams Separation of Work User Manual Bill of Materials Gantt Chart Appendices 11 12 13 14 15 Page 2 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition List of Tables Table 1 Separation of Work Table 2 Bill of Materials List of Figures Figure 1 Block Diagram Figure 2 Sensor Unit Hardware Flowchart Figure 3 Power Unit Hardware Flowchart Figure 4 Head Unit Hardware Flowchart Figure 5 Software Flowchart Figure 6 User Manual Figure 7 Gantt Chart 11 13 10 12 14 Page 3 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Project Features Objectives Magnet Sensor A magnet is placed on the spokes of the front bike wheel which turns on a Reed switch with every rotation and provides the measurement for the speed and acceleration A microprocessor reads the signal and sends the rotational speed wirelessly via Bluetooth to the head unit which is attached to the handlebars Head Unit The head unit will be composed of seven major components GPS LCD Heart Rate Receiver Solar Battery Charger Bluetooth Module and MSP430
13. which stores the heart rate value the speed and distance information and GPS GGA and RMC output message The LCD we purchased for our project came with a built on microprocessor which we program with our software in the format created by the manufacturer Heart Rate The Polar Chest strap uses a magnetic field to transmit your heart rate data to the receiver The magnetic field is generated and detected using coils in the transmitter and receiver The receiver coil is place in parallel with the magnetic flow generated by the transmitter for maximum energy transfer The maximum distance between the transmitter and receiver should not exceed 2 6 feet Page 7 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Solar Battery Charger 3 7V Lithium Battery Power circuit i Heart rate Receiver MSP430F5436 Magnet sensor SMD Module Rayson BTM 182 i FS436 pre ds displays clock time date distance speed memory card status longitude and latitude Figure 1 Block Diagram of Overall System Flowcharts and Diagrams Wheel Sensor Hall Effect Reed Switch Programming Header Sensor FRB2282 951214 4620 AR PR Unit A1360LKTTN T Bluetooth Processor Bluetooth SMD Module MSP430F5436 Rayson BTM 182 iii SMD Module on Head Unit CR1025 Battery Figure 2 Wheel Sensor Board Diagram Page 8 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Chest
14. within the material The energy absorbed loosens electrons and allows them to flow around creating a current Metal placed on top of the cells draws the current out combining with the cell s voltage it provides power to the lithium ion battery attached Page 6 DesignTek Enterprises Xtreme Chariot RDX 4398 PRO Limited Edition Battery and Power Circuit The3 7V lithium ion battery goes to a power switch which powers the entire bike computer via the power circuit Since each device within the bike computer head unit required different voltages the power circuit had to be created The power circuit is composed of 5V Breakout board 5V to 3 3V Low Drop out Regulator 6V Step up circuit and the solar panel charger The 5V Breakout board can receive an input voltage anywhere between 1 4V and outputs 5V The 5V powers the GPS module the Heart rate receiver the 6V Step up circuit and the LDO Regulator which produces 3 3V The 3 3V powers the MSP430f5436 and the comparator circuit The 6V Step up circuit receives the 5V and outputs the 6V to power the LCD The comparator circuit compares the battery voltage to a stable voltage to determine if the battery is low and needs to be charged The stable voltage comes from the 5V but connected to a voltage divider to produce 2 5V When the battery voltage is dropped below 2 5V an LED will illuminate alerting the cyclist that the solar battery charger must be turned on shortly Refer to Figure 3 Magnet Se
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