Well, no. I don't have that kind of time. But the basic idea is that you want to get a frequency to voltage converter IC, then connect an op-amp to it's output as a comparator. The output of your comparator then goes to your relay/transistor/etc. to drive the light.
That said, aftermarket shift lights are very cheap, and by the time you spend the money and time to make the circuit, the costs will generally equalize.
Here try this and let me know if it works .automotive speed indicator but I think its more a RPM speed indicator. I would build it but i dont have all the parts needed. http://home.maine.rr.com/randylinscott/mar21.htm
Shift Lights
Posted - Apr 19 2003 : 03:56:37 AM
