Hi,
Mr.Aubrey Kagan

yes....we are new in triac.Here i had tried to insert my circuit diagram..but insert image support only web page.

so,how can we send circuit diagram.Is there any other option to attach file.

here,i explain my program:

first to complete 1 cycle 20 milisecond time period is required.
and for half cycle there is 10 milisecond.
1 cycle=360 degree
and we have use that's zero crossing signal at every half cycle.
and zerocrossing signal command given to the micro controller for triac firing angle control at differnt degree .And at output side we have used triac to change the Ac 230v blub brightness.


In our program there are three loop.
port p3.0 bit WILL zer0 [MOV A,0B0H] [CJNE A,#11111110B] at the zero crossing then p1.3 remain low for 2 milisecond and then after high..becouse triac is off after one complete cycle if gate signal is not present.

in second loop,port p3.1 bit WILL zer0 [MOV A,0B0H] [CJNE A,#11111101B] at the zero crossing then p1.3 remain low for 5 milisecond and then after high..becouse triac is off after one complete cycle if gate signal is not present.

in third loop,port p3.5 bit WILL zer0 [MOV A,0B0H] [CJNE A,#11011111B] at the zero crossing then p1.3 remain low for 7 milisecond and then after high..becouse triac is off after one complete cycle if gate signal is not present.


also we got exact waveform on CRO at the p1.3 pin of micro controller AS PER PROGRAM LOGIC but nothing change in triac output..BLUB BRIGHJT IS NOT CHANGED also we have used multimeter for voltage measurement at triac output side.

we are waiting for your reply


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