Recently I've bought one of these AC speed controllers AC Speed controller from china. After a few tests the BTA16-600BW Triac blew up, so I tried to reverse engineer this controller.
This is the circuit which I got from reverse engineering
Actually I dont understand how this circuit works. As far as I know, the C2, R4,R1 andf R2 network is used to genarate the pulses to turn on the triac. but how exactly does it work?