PIC IR Light Dimmer ( working grate )

PIC16F628 IR Light Dimmer ( working grate )

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Its working grate

The output stage looks a bit bizarre. Why not just use a simple zero crossing Triac with a logic level drive for the output.

I made a driver circuit which timed the period between the zero crossing measured from the supply transformer for calculating the phase trigger of the triac when I designed a washing machine motor controller.