Optically Isolated Phase Controlling Circuit

[dhanush]

In the first schematic H11L1 trigger LM555 at every zero crossing, in the second schematic H11L1 is on all the time (so it is useless). Second schematic will not work!

Zero crossing happens when the sin wave of your main, cross the zero line.

Al.

What is the problem on second schemetic? Please resolve the problem on second schemetic, I dont need to connect directly on main, I need to connect via transformer, please help me.

I have an another circuit that was published on EFY Magazine, that circuit is connected via transformer, I will give you that pdf link http://www.electronicsforu.com/EFYLi...-01_July06.pdf and recorrect my error on second schemetic. I need to work second schemetic same like newly given schemetic. Please resolve it.

Thanks for reporting the error.