Iam facing aproblem on firing triac , iam using pic16f84 to control the firing phase angl Via timing
attached the circuit
there is only problem that the triac cut off when itis loaded by 100 watt load
every thing is ok this include
1. zero crossing detectin
2 signals from/to pic16f84
3.opto coupler "IS623" and opto isolator 4n35
i check the phase control proccess by oscilloscope and phase controlled wave was OK
the only problem is the triac goes off when the 100watt load is loaded