Automatic Bike Brake Light

This is an automatic back light for electric bicycle. I wanted it to work without switches for the brake levers so I used an accelerometer.

The software can be found here: https://github.com/ChristophPech/BrakeLight

The LEDs are powered through a Mosfet and the Arduino's PWM controls brightness for normal operation and braking state.

The accelerometer is polled at 2kHz then accumulated to 10Hz and put through a band pass filter to remove noise (low pass) and align to the normal orientat