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Homemade Noise Canceling Electronic Edge Finder


BUILDER:
rgsparber on homemadetools.net
DESCRIPTION:
Homemade noise canceling electronic edge finder intended for use with lathes and mills. Device is self-calibrating. Circuit is designed to interpret sudden voltage drops as touchdown. Calibration/Touchdown LED flashes to indicate contact. Circuit incorporates two LM324 quad op amps and features magnetic probes.
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