Project Credits: Electronoobs ([ Ссылка ])
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In this tutorial, we will design a circuit using TRIAC and optocoupler to make a 220V Wireless AC Light Dimmer with Android Bluetooth & Arduino.
We have AC loads everywhere around us. And most of the home appliances are supplied with the AC mains power. There is plenty of situations that we want to have full control over an AC load such as a dimming of a lamp, speed control of AC motor/Fan, Vacuum Cleaner Control and so many other applications. The proper way to control dimming 230v AC is through phase control with a Triac: the Triac then is fully opened, but only during a part of the sinus AC wave.
But the controlling an AC load is not as easy as controlling a DC load. The electronics circuit for both these applications is different. The AC mains with a sinusoidal wave has the frequency of 50Hz. To build an AC dimmer, the zero-crossing points (the points where the wave changes its polarity) are important. To detect these points, we have to build a zero-crossing detector first. Similarly, we have to control the phase and cycle of the waveform. Since every component can’t tolerate 220V AC, so we need to isolate the circuit from 220V AC using some other component. The whole process is explained in the video & website link.
Source Code & Gerber File Link: [ Ссылка ]
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