Multi-Channel AC Dimmer Control: 2CH and 4CH Guide Feb 26, 2026 0 463 TL;DR: 2CH 8A and 4CH 10A modules share one ZC pin across all channels. Each channel has its own DIM pin. One interrupt call in code covers all channels; brightness is set independently per channel ha... ac-dimmer Arduino ESP32 ESP8266 multi-channel RBDdimmer tutorial Read more