LM555 Timer Monostable AC Power Phase Control Demo @LewisLoflin

Uploaded February 2025 | Updated September 2026, 2 hours ago

In the past, an Arduino used interrupts from a zero-crossing detector and a software routine to control the phase angle of AC power with Triacs and SCRs. This circuit will use an LM555 timer in the monostable mode to do the same thing.
bristolwatch.com/science/lm555_ac_control.htm

LM555 Timer Monostable AC Power Phase Control Demo

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