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A device or circuit that generates an AC signal at a certain frequency.

27 votes
7 answers
5k views

Why are two 555 timers in separate sub-circuits cross-talking? (Poltergeist in the Breadboard)

As an introduction to electronics, I am following Charles Platt's Make: Electronics (2nd edition). Every circuit worked as expected, until Experiment 17: Set Your Tone. In circuit on figure 4-37 (page …
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