TIL probe circuit

Published:2011/4/20 8:55:00 Author:Nicole | Keyword: probe | From:SeekIC

If the polarity switch is in the position as shown, when the input probe receives low level(nagative)pulse, LED lights and it will keep lighting until the circuit is reset. If the switch is put to another position, when there is high level or +5V input pulse, LED lights too.



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