How to hack a Bosch Performanceline CX Speed limiter (Trek EBike)
This project requires a bit of soldering experience, but is possible for a moderately skilled DIYer. Feel free to create your own fork of my code if you like. If you have questions, feel free to ask. This hack will work with almost any EBike.
Code can be found here: https://github.com/Highervoltageprojects/Higher-Voltage
Parts:
Arduino - https://www.sparkfun.com/products/11113
FTDI Programmer - https://www.sparkfun.com/products/9718
Prototyping board - https://www.sparkfun.com/products/13268
Header pins - https://www.sparkfun.com/products/116
Voltage regulator - https://www.pololu.com/product/3794
Light cable - https://shop-usa.scooteretti.com/products/bosch-light-cable
390 Ohm resistor - https://www.digikey.com/product-detail/en/stackpole-electronics-inc/CF14JT390R/CF14JT390RCT-ND/1830340
51K resistor - https://www.digikey.com/product-detail/en/stackpole-electronics-inc/CF14JT51K0/CF14JT51K0CT-ND/1830392
Omron relay - https://www.digikey.com/products/en?keywords=omron%20355cr
Many of these parts can be found on Ebay or Amazon for less if you are willing to look around.