Figure-2, Schematic diagram of the digital AC dimmer. R1, R2, IC1 [1], D1, and C3 build the zero crossing detector circuit. It is designed to make proper isolation (optically) with the mains voltage.

Schematic of the Arduino Lights Dimmer Circuit You must have 4 identical circuits for each lamp that are connected to pins 3, 5, 6 and 9 on the Arduino UNO Board. Also be aware that this project is ...

Working of Arduino Lamp Dimmer Circuit. Below are the pictures of showing three stages of dimming the AC bulb using Arduino and TRIAC. 1. Low dimming step . 2. Medium Dimming step . 3. Maximum Dimming ...