So while Im off to read the datasheet on IRF540N and watch some MOSFET for dummies video on youtube, how about the signal input? Will I need large inline automotive-type resistors? and is there more to it than that? Will the normal running of the circuit that supplies the signal be affected by adding to it?
I intend the standalone IC to run off the motorcycle battery, are the power requirement the same as a full Arduino board? and would the ground pin run to the motorcycle frame/chassis?