Project  # 08
2000W AC Light Dimmer / Temp  or
Motor  Speed Controller
(AC 230V) 

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WARNING : This project is mains operated. Do not touch any part of the circuit when power is on. Electric shock can be fatal.
DESCRIPTION :  

This dimmer circuit can be used to control the brightness of incandescent light bulbs, the temperature of heaters & the speed of AC motors.  The max. controllable power is 2KW (i.e. 2000W)

Schematic  
Click on picture to enlarge
 


CONSTRUCTION :


Step (1) :  Insert, solder (trim leads) the parts shown in this picture

 

Step (2) : Install the heat sink & TRIAC


Step (3) : Install the potentiometer
 with bracket

PARTS LIST

P.C.B . Etched & drilled printed circuit board (included)
TRIAC BTA24  High current TRIAC,  25A   (Datasheet)
DIAC DB3,   (Datasheet)  
Capacitors (C1, C2)  0.1 uF 630V  (# 104) capacitors
Potentiometer (R3) 

B500K (linear taper) 

Resistors

R1 --4.7K,  ( 1/4W or 1/6W)
R2 --100
Ω,  ( 2W)

Heat sink,   2-contact Terminal Block,   Plastic knob,  3mm screws ( x 3 pcs)

Buy the complete set of components for this project :
(all the parts in picture)