Hi folks, I have built a circuit around a 16F628 that drives a Triac directly (PIC = - 220 ohms - gate) and it works fine with incandescent lamps / bulbs. = Since I am not interested in controlling the phase angle as such (the = load is to be on, or off, the intensity is not to be controlled) I am = not pulsing the gate of the triac; the pin driving the gate is always = either on, or off. Now, my question is, can this setup be used to switch heavier loads such = as an air-conditioner, if I use a triac of an appropriate rating? Which brings me to the second question! Even triacs rated at 12 Amps, = 400 volts come in a TO220 package. Can these devices really control the = load of an air-conditioner without blowing up? Would a heat sink be = required? Incidentally, I have 230 volts AC in my country, and the AC I'm = interested in controlling would be 1.5 tons. Any advice here would be greatly appreciated, folks! Thanks and regards, Anand Dhuru -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu