Hi,i am a complete novice when it comes to making electronic circuits so require some help,i am reasonable at soldering though so hopefully will be able to make a circuit.
I need to know how to make OR where to buy a voltage divider which could be made to make an old style car rev counter(12v) work with a newer engine(5v),these things are available to buy i have been told but the price is quite high for something that i have been told is relatively simple.
Its a while back now but the item i saw only had 4 wires coming out of it,
1, switched 12v
2, ground
3, rev counter output
4, >to vehicle rev counter
can anyone help?