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I am a new user to the TI 4305529 launchpad and I'm using Energia. I am trying to compose a program to determine the frequency of a cyclic signal. The signal will be generated by one of several methods 1 a magnet passing close to a pickup coil 2 a magnet passing close to a Hall Effect detector 3 an interrupted light beam I'm not yet sure which one yet What I need to know is the requirements on the input signal, Voltage levels wave forms , Square wave, Sinusoidal, output impedance of signal generator, etc, etc. Now I know this is a large question . I am looking for some help getting started. By way of information I am a retired Electrical Engineer, but of the PT era (Pre Transistors). Bits were flat back then . Thanks