Zero-Cross Not Detected: AC Dimmer Doesn't Respond to Commands 26 févr. 2026 0 7 TL;DR: An AC dimmer can't regulate the load if the microcontroller isn't receiving the zero-cross signal (the sine wave crossing zero). Without this signal it's impossible to calculate the TRIAC firin... Arduino ESP32 ac-dimmer troubleshooting zero-cross En savoir plus