Smooth Lamp Dimming on Mains: Arduino + Zero-Cross + 4×20 LCD
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YouTubeUncle Duncan's Electronics Shack
Smooth Lamp Dimming on Mains: Arduino + Zero-Cross + 4×20 LCD
Description Build a zero-cross synchronized phase-angle AC controller with an Arduino Uno, triac driver, and a 4×20 I²C LCD. We go from wiring to rock-solid timing: ZC on D2, triac gate on D3, pot on A0—then harden the code with Timer1 single-shot pulses, CHANGE-edge ZC, polarity gating, half-cycle lockout, and per-polarity trim to kill ...
729 views10 months ago
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