GitHub - Egoruch/Zero-Crossing-Detector-STM32-HAL: Two simple circuits (electrically isolated and non-isolated) of zero-crossing detector of main's AC.
![110/220VAC Opto-Isolated Zero Cross Detector Module for DIN Rail Carrier Mount with 3.3V or 5V Output - Ideal for Arduino, ESP32/ESP8266 - Share Project - PCBWay 110/220VAC Opto-Isolated Zero Cross Detector Module for DIN Rail Carrier Mount with 3.3V or 5V Output - Ideal for Arduino, ESP32/ESP8266 - Share Project - PCBWay](https://pcbwayfile.s3.us-west-2.amazonaws.com/web/22/08/16/0945466172183.png)
110/220VAC Opto-Isolated Zero Cross Detector Module for DIN Rail Carrier Mount with 3.3V or 5V Output - Ideal for Arduino, ESP32/ESP8266 - Share Project - PCBWay
![Dimming effect by zero crossing detector and a triac - #18 by Deva_Rishi - Programming Questions - Arduino Forum Dimming effect by zero crossing detector and a triac - #18 by Deva_Rishi - Programming Questions - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/8/c/9/8c9cd7d76214fd2bbc2ef1610b5d4e0e038bc12c.gif)