The eChook Nano Kit
Greenpower sell an eChook Nano kit that contains all the hardware and sensors needed to get eChook telemetry running on a greenpower car. The android app and live data website are free to use, no kit purchase necessary.
This is a DIY kit containing of the eChook PCB, all components required to populate the PCB as well as sensors for Current, Temperature (x2) and Rotation (Wheel and motor shaft).
Buying or DIYing the eChook nano
The kit is sold exclusively by Greenpower through their Green power store here.
If you want to source the components yourself, the bare eChook nano GPT board is available from the eChook shop here.
If you want to go totally DIY, or tweak the PCB to your own requirements, the schematics and PCB layouts are Open Sourced and available on GitHub.
Kit Contents:
Quantity | Component | Use |
1 | eChook nano PCB | |
1 | 470r Resistor | Voltage drop for LED |
12 | 1k Resistor | Protection for Arduino pins |
2 | 4k7 Resistor | Input Resistors for current differential amplifier |
4 | 10k Resistor | Feedback on Differential amp and pull ups for Thermistors |
2 | 16k Resistor | 24v and 12v Potential Dividers |
1 | 47k Resistor | Post amp current filter |
2 | 82k Resistor | 24v and 12v Potential Dividers |
1 | Green LED, 5mm | Indicator LED on PCB |
1 | BC547 NPN Transistor | Amplification stage of PWM output on PCB |
3 | Ceramic Capacitor 1uF | Low Pass filtering on some sensors |
1 | 22uF 50v Electrolytic Capacitor | Input voltage smoothing for the regulator |
2 | 47nF Ceramic Capacitor | Smoothing Capacitors for current sensor (not on PCB) |
1 | 4.7nF Ceramic Capacitor | Smoothing Capacitors for current sensor (not on PCB) |
1 | 0.25A Radial Resettable Fuse | Over current protection (Short Circuit) |
1 | 8 Way DIP Socket | Socket for Op-Amp |
1 | Microchip MCP6002 Dual Op Amp | Used in differential amplifier for current input |
2 | 15 way SIL 2.54mm Female PCB Socket | Socket for Arduino |
1 | 6 way SIL 2.54mm Female PCB Socket | Socket for Bluetooth Module |
1 | 5v 1A Voltage Regulator (Tracopower TSR 1-2450) | Take 24v from the car and provide a robust 5v to the Arduino |
1 | Rectifier Diode, 50V 1A | Reverse Polarity Protection |
2 | NTC Thermistor 10kΩ@25° | Temp Sensor (not on PCB) |
2 | Hall Effect Sensor (A1101EUA-T) | Sensor for wheel/motor rpm (not on PCB) |
1 | Current Sensor (LEM HAIS 50p) | Senses current in the 24v cable from the battery. |
3 | 4 pin Pluggable Terminal 5.08mm | Connectors |
2 | 3 pin Pluggable Terminal 5.08mm | Connectors |
1 | 2 pin Pluggable Terminal 5.08mm | Connectors |
1 | 3 pin Pluggable Terminal 3.81mm | Connectors |
1 | Arduino Nano | The Brain of the eChook |
1 | USB Cable for Arduino | Connect Arduino to PC |
1 | HC-05 Bluetooth module | Send data to phone over bluetooth |
1 | 6 way Male-Female PCB Jumper Cable (Dupont Connectors) | Allows connecting the bluetooth module remotely |
8 | Neodymium Puck Magnets | Place on hub and motor shaft to trigger hall effect sensors |
Tools and Consumables Required
Some tools and consumables will be required to build the kit and integrate the sensors to the car:
Soldering Iron and Solder
Solder Sucker or solder wick (handy correcting any build errors)
Wire Snips
Small flathead screwdriver
Multimeter
Wire for connecting sensors remote to the board
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