QUOTE(timothy_nd28 @ Dec 28 2014, 03:51 PM)
I have a couple DIY'er threads on how to integrate single or multicolor LED's inside each gauge can. I can also do it for you and include my custom controller which changes the color to red at a set RPM
Just out of curiosity. Did you use an arduino for the tachometer?
I built one that works on either the stock ignition (tach signal) or (easier) a cleaner signal from a Mallory unilite optical pickup.
I used an interrupt driven frequency counter in the Arduino.
Turns my tach bright blue as a shift light.