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The BEAM Circuits Collection is a BEAM Reference Library site.

The SC (Schmitt Comparator) Head
A simple little design by Martin Keen and Wilf Rigter

I'll eventually post an explanation, but in the meantime, here it is:


Meanwhile, a slightly refined version (with flashing LEDs to indicate "lock") was posted a few weeks later:


For more information...

The discussion of this circuit starts here, and pretty much wraps up with Wilf's presentation of V4 of the circuit here.

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Page authors: Bruce Robinson and Eric Seale
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