Mạch phát hiện điểm 0 dùng opto PC817 (zero crossing detector circuit using optocoupler) - Dien Tu Viet Nam
![Dimming effect by zero crossing detector and a triac - #19 by Juraj - Programming Questions - Arduino Forum Dimming effect by zero crossing detector and a triac - #19 by Juraj - Programming Questions - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/c/5/f/c5fd51879d0253189c23cabf8b601b8076a1a326.png)
Dimming effect by zero crossing detector and a triac - #19 by Juraj - Programming Questions - Arduino Forum
GitHub - bga/zero-cross-AC-opto-detector: simple isolated AC zero cross detector using cheap PC817 and TL431
![switch mode power supply - Will this zero-cross detection circuit work? - Electrical Engineering Stack Exchange switch mode power supply - Will this zero-cross detection circuit work? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/8kQij.jpg)
switch mode power supply - Will this zero-cross detection circuit work? - Electrical Engineering Stack Exchange
![Dimming effect by zero crossing detector and a triac - #19 by Juraj - Programming Questions - Arduino Forum Dimming effect by zero crossing detector and a triac - #19 by Juraj - Programming Questions - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/8/c/9/8c9cd7d76214fd2bbc2ef1610b5d4e0e038bc12c.gif)
Dimming effect by zero crossing detector and a triac - #19 by Juraj - Programming Questions - Arduino Forum
![switch mode power supply - Will this zero-cross detection circuit work? - Electrical Engineering Stack Exchange switch mode power supply - Will this zero-cross detection circuit work? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/hNyXG.jpg)
switch mode power supply - Will this zero-cross detection circuit work? - Electrical Engineering Stack Exchange
![GitHub - bga/zero-cross-AC-opto-detector: simple isolated AC zero cross detector using cheap PC817 and TL431 GitHub - bga/zero-cross-AC-opto-detector: simple isolated AC zero cross detector using cheap PC817 and TL431](https://raw.githubusercontent.com/bga/zero-cross-AC-opto-detector/master/real/osc00.png)