Speedometer

Intro
Speedometers tell you how fast you are going. This one will measure the RPM of the bike wheel and do some math to display the speed.

Problem/Inspiration
My brother wanted a speedometer for his bike.

The Process
The plan was simple:
1. There was no plan.




Remarks
It works. Nothing special. Though, I really wished I used LED drivers instead of bit-banging every single LED in the display.