ROOM TEMPERATURE CONTROLLER USED BEING CONNECTED TO LIGHTING LAMP SWITCH LINES.

摘要

PURPOSE: A room temperature controller is provided to remove an additional power supply line by receiving power through a lamp switch line. CONSTITUTION: A first coil(L1) is connected between an AC common terminal and a first terminal of a triac. A second condenser(C2) is connected between the first terminal of the triac and a circuit ground terminal. The cathode of a first diode(D1) is connected to the AC common terminal. The anode of the first diode is connected to the circuit ground terminal. A first zener diode(ZD1) and a third condenser(C3) are connected between the first terminal of the triac and a gate terminal. A negative temperature coefficient thermistor is connected to the second terminal of the triac. A varistor is connected between the first and second terminals of the triac.