Ebike binary throttle conversion for bikes with pedal assist only. Allows you to push a button to activate pedal assist rather than pedal. Uses $5 Arduino and $3 relay. Tested and works
A DIY E-bike Conversion on the Cheap - IEEE Spectrum
Arduino Controlled Smart Electric Bike - YouTube
Automatic Speed Controller for Electric Bike using Arduino and mpu6050
Designing the e-bike BlackBox – Blog for Medad Rufus Newman
Arduino Pedelec Configurator Demo - YouTube
Control Powerful Electric Skateboard E-Bike 350W DC Motor Using Arduino and BTS7960b : 9 Steps - Instructables
Electric Bike Automatic Speed Controller using Arduino & Gyroscope MPU6050 " Ebike" E-Bike - YouTube
Bike computer
ArduBike 250W, an Arduino-Based E-Bike Controller - Hackster.io