Control014

                                          

TRIAC Lamp Dimmer
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Schematic design of TRIAC lamp dimmer
Part List :
Capacitors	Resistors
C1,C2   =   0.068 μF / 250V Others L1      = Lamp to be controlled ( up to 350 W) L2      = Neon lamp for indicator MISC = Case,Knob,Heatsink,Wire,Socket for L1	R1     =   50K Ω Linear potentiometer R2     =   15K Ω ½W Semiconductors TR1     = 40502 TRIAC (heatsink required)
Notes & CAUTION
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.   This circuit is for 117VAC only. 220 or 240 V will burn up the circuit. L1 can be a maximum of 350 watts. .  The circuit must be installed and used in a case.

Source : Electronics Lab