I'm currently trying to fix this in my project
The idea is simple = take the speed signal (square wave AFAIK), and somehow interface it to a EL wire LED which would then display the speed digitally.
What i'm unclear about is the interfacing between the speedometer and the 7-segment LED display. What decoder do I need to get in order to see the speed from the output, or am I looking at the whole thing wrong?
Can anybody jumpstart me? or point me somewhere.. :-/