The Speedi device tricks the speed sensor on the rear wheel into spinning more slowly, effectively raising the e-bike’s electronic speed limit by around 50%. It uses a small gear with a 1:1.5 ...

To bridge the 6.3 mm spacing between the PCB and the top of the enclosure [Daniel] used a small, 7 mm PCB-mounted spring. The spring used to create a capacitive touch sensor. (Source: JLCPCB parts) ...