AC Light Dimmer using 8051 ?

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Rahul Ahuja

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Hi
I am trying to make a 230V AC light dimmer using 8051. I have developed a circuit shown below. But i am facing a problem that i am not getting any output from BT136.




Please help me in fixing the problem ?
 

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Hi tpetar
I have tried it on real parts.

initially i gave +5v to the pin which is connected to the microcontroller to switch on the optotriac diode but i did not get any output at lamp side.
 

You need to use resistor for diode to limit current. Maybe you kill diode, replace opto triac.

Check code.

First check optotriac with 220V load only with 5V source without uC. Use power source of 5V and 220V for optotriac led.
 

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