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Son of Anything To Clock--LM311, Lower Parts Count

Last post I described a subcircuit that would take an audio signal from maybe 50K to below audible frequencies and turn it into a square wave—useful for turning audio into a clock signal for an MPU.

It worked, but discussion ensued at my geeky audio meetup: is there an easier way to do this?

Of course there is….Elton at OtterMods had a similar circuit, with lower parts count, based on an LM311 comparator.

This post I’ll discuss Elton’s design, the LM311 comparator and build a prototype Break Out Board.”

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