Hi, I'm a beginner in electronics and have started playing around with PIC's. I'd like to start a project to complement my motorcycling hobby. I'd like to monitor the engine speed of my bike and record the peak rpm and average. The tacho on my bike is controlled from the ecu which outputs a 10.5v square wave. My understanding is that this is at too high a voltage to be connected directly to a PIC which operates at 5v max. Can anyhow explain the electronics I'd need between the ecu output and the PIC (a diagram would help!). FYI. My bike is a Honda CBR1000RR and the PIC I'm using is a PIC18F4520. Regards.