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.

If you’re above a certain age, you probably remember the atmosphere of a pre-Powerpoint 35 mm slide show. The wobbly screen being unrolled, the darkened room, the soft hum of the projector&#8… ...

Arduino-Powered Turntables That Turn DJing Into Child's Play Each Arduino mimics a different instrument: one plays the bongos, another plays the bass, and the third plays the snare drum.