Basically it consists of an led that emits infrared light and the photosensor which detects it.
Ac light dimmer using microcontroller.
With help of digital buttons you can control the brightness from 0 to 9.
So you can reach to the required voltage by triggering the triac after a specific delay do you recommend this.
When the ac voltage crosses the zero the microcontroller will be interrupted an therefore detects the zero crossing.
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.
Here we are used a moc3021 optocoupler to control the ac lamp from microcontroller signals which is a dc signal.
Phase cut using a microcontroller now that we know the importance of zero cross.
Control the brightness of the light using 8051 microcontroller.
Capable of delivering 100 200 watts of.
Microcontroller is actually the main intelligent controller of this device which is interfaced with zero crossing detector optocoupler 1 optocoupler 2 and lcd display.
We re only going to be making the ac waveform dimmer here.
This ac dimmer of two loads using single controller works on the principle of triggering pulse which is generated by the microcontroller.
This project deals with ac electricity which is dangerous if you don t know how to treat it safely.
For this design we will be designing an ac dimmer for incandescent lamps with the following features.
Note that this is an ad hoc device in that it is designed to controlling resistive loads only like most toaster ovens.
A nano watt microcontroller can be used to generate a feature rich dimmer design.
Plus we know that we can control a.
The compact ac light dimmer module with zero crossing detector described here is ideal for microcontroller based ac voltage controlling applications and projects.
I go into the comparison between a regular ac and then ac signal post triac dimmer in the next section.
We previously used the same moc3021 optocoupler in triac dimmer circuit.
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.