Makers and developers searching for a Raspberry Pi and Arduino compatibl e DC crank set may be interested in the new kit which is being created by multiple Kickstarter entrepreneur Patrick Thomas ...

The full write-up is in the included PDF file, and describes the set-up of an Arduino Nano sitting between throttle and controller, and taking feedback from a current sensor.

To solve the problem without sourcing a new switch, [Jean-Noel] built his own Arduino based Dahlander switch. This consists of three relays that select the wiring configuration for each speed mode.