Ac Light Dimmer Using Microcontroller

Phase cut using a microcontroller now that we know the importance of zero cross.

Ac light dimmer using microcontroller.

Capacitive and inductive loads require some slight modifications the addition of snubber components which won t be covered here but information is available online and in the component datasheets. Description of the microcontroller controlled light dimmer a light source 10 which may be for example an incandescent light source drawing between 40 and 2 000 watts of power is connected to a source of ac power 12 through. The compact ac light dimmer module with zero crossing detector described here is ideal for microcontroller based ac voltage controlling applications and projects. Here we are used a moc3021 optocoupler to control the ac lamp from microcontroller signals which is a dc signal.

This ac dimmer of two loads using single controller works on the principle of triggering pulse which is generated by the microcontroller. With help of digital buttons you can control the brightness from 0 to 9. A nano watt microcontroller can be used to generate a feature rich dimmer design. This project deals with ac electricity which is dangerous if you don t know how to treat it safely.

This module contains a triac triggering coupled with zero crossing. We re only going to be making the ac waveform dimmer here. For this design we will be designing an ac dimmer for incandescent lamps with the following features. I go into the comparison between a regular ac and then ac signal post triac dimmer in the next section.

When the ac voltage crosses the zero the microcontroller will be interrupted an therefore detects the zero crossing. Note that this is an ad hoc device in that it is designed to controlling resistive loads only like most toaster ovens. This project describes how to control with arduino microcontroller an 8ch ac board by using zero cross detection and firing angle method to dimm incandescent or alogen light bulbs and create light effects. Plus we know that we can control a.

So you can reach to the required voltage by triggering the triac after a specific delay do you recommend this. We previously used the same moc3021 optocoupler in triac dimmer circuit. Control the brightness of the light using 8051 microcontroller. Basically it consists of an led that emits infrared light and the photosensor which detects it.