Wednesday, June 6, 2012

220V Light Dimmer circuit diagram

This simple 220V light dimmer circuit can be used to adjust the brightness of mains lights. It also can be used to adjust the speed of AC motors. It uses a triac, diac and has a radio-frequency interference (RFI) noise suppression circuit built into it as well.
Schematic diagram:
220V Light Dimmer circuit
Component part:
R1 = 10K
R2 = 2K2
R3 = 180K
Potentiometer 250K
C1 = 150nF/400V dipped polyester
C2 = 47nF/630V? dipped polyester
C3 = 220nF/250V AC dipped polyester
Triac = 2N6075 or BT136-500D
Diac = HT-32
FUSE 2A or 3A

Download the circuit documentation of 220V/240V Light Dimmer. The kit of this circuit is available at, please visit the website to purchase the kit.

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