I am working on a formula style car and creating a digital dash based on an Arduino. I currently have a signal from the ECU running at 12v DC and a varied frequency depending on the RPM of the engine. What I need to do is lower the voltage to 5v DC and maintain the same frequency, with as little frequency noise as possible on the output. Is there a good way to do this? Do Voltage Regulators keep frequency, or at least keep some sort of ratio?
UPDATE - SOLVED
My team and I just realized yesterday that we can use the CAN-BUS signal straight out of the car and just comb through the data for what we need. A little bit more coding, but way easier in the long run. Less wires too :D