/diy/ - Do It Yourself

I made this sketch of an SCR control circuit, but I don't think it will work the way I intended (0, 12 %, 25 %, 50 % power control). I think it would need some kind of monostable circuit between the D flip-flop and the opto that would give short trigger pulses to the thyristor. But the circuit is already ridiculously complicated for such a simple function.