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
Kit Contents

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