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Tuesday, August 18, 2009

TRIAC Light Dimmer


This little circuit can be used to dim lights up to about 350 watts. It uses a simple, standard TRIAC circuit that, in my expirience, generates very little heat. Please note that this circuit cannot be used with fluorescent lights.

















Parts
R1 50K Pot
R2 15K 1/2W Resistor
C1, C2 0.068 250V Capacitor
L1 Lamp To Be Controlled (up to 350 watts)
L2 Neon Lamp
TR1 40502 TRIAC
MISC Case, Knob, Heatsink For TR1, Wire, Socket For L1




Notes
1. This circuit is for 117VAC only. 220 or 240 V will burn up the circuit. L1 can be a maximum of 350 watts.
2. The circuit must be installed and used in a case. (We'll give you 230 v circuit recently)

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