AC Dimmer Safety: Mains Voltage, Isolation, and Wiring 26 февр. 2026 г. 0 14 TL;DR: AC dimmer modules use optical isolation — the MCU-side pins (ZC, DIM, VCC, GND) are electrically separated from 230V mains. The AC terminals (AC-IN, AC-N, AC-OUT) are live mains voltage. Size w... ac-dimmer safety theory tutorial Читать далее