I have built the PPL frequency to voltage converter using the ideas on AN-210 (from National.com), but I need a quick, stable converter that will operate between 50-250hz, and I cannot get these circuits to run down that slow. Does anyone have an idea how I can get a f/v converter down to 50hz? The input signal changes from 50-250hz over about 10seconds
( ignition pulse from 2 stroke motor) and I am sampling the voltage at 50 times per second.
( ignition pulse from 2 stroke motor) and I am sampling the voltage at 50 times per second.