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Electronic circuits that use the 555 Timer

555 Timer Circuits

555 Timers are fun and a great way to start learning electronics

CONTINUITY TESTER Circuit

This circuit will detect low resistances and high resistances to produce a tone from the speaker.
It will detect up to 200k and the circuit automatically turns off when the probes are not used.



Comment on this circuit or view the Electronic Circuits Community Forum.

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