TRIAC Light Dimmer


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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.

Schematic

This is the schematic of the TRIAC Light Dimmer

Parts

Part
Total Qty.
Description
Substitutions
R1150K Pot
R2115K 1/2W Resistor
C1, C220.068 250V Capacitor
L11Lamp To Be Controlled (up to 350 watts)
L21Neon Lamp
TR1140502 TRIAC
MISC1Case, 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.

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Comments

yasir
TRIAC Light Dimmer
Tuesday, April 22, 2008 4:53:01 PM
hii, plz message the working of this circuit & how can vary the bright of the lamp (in gate of triac which element varying current , voltage or freequancy of the gate pulse)
doctorDHD
TRIAC Light Dimmer
Sunday, April 06, 2008 8:01:39 AM
Here is a link to a 220VAC dimmer http://www.electronics-project-design.com/Light-Dimmer-Circuit.html
Zanes
TRIAC Light Dimmer
Wednesday, March 19, 2008 7:35:17 AM
sir, do i have to change the type of triac if i intend to use 220VAC supply?
thornz
TRIAC Light Dimmer
Monday, March 03, 2008 2:21:04 PM
sir how can i apply the circuit to a 220v power source?
dhon
TRIAC Light Dimmer
Tuesday, February 19, 2008 2:56:44 AM
sir, can you please help me on how to operate this light dimmer in 220V ac source... and what altenative lamp can we use in this circuit... tnx...
ernieEErnieanonymous
TRIAC Light Dimmer
Sunday, February 10, 2008 7:09:07 PM
How can I make this circuit work with 10.5 VAC?
saurabh sachdeva
TRIAC Light Dimmer
Monday, February 04, 2008 3:55:42 AM
circuit of light dimmer is to claer & easy to make and cheap & best. i like it
Brian
TRIAC Light Dimmer
Sunday, December 30, 2007 6:43:58 PM
Can anyone direct me to specs for an "8TA12"? I believe it's a Triac. It's used in a lamp dimmer. I'm looking for a drop-in replacement. Brian
Tom
TRIAC Light Dimmer
Monday, December 03, 2007 5:04:05 PM
I want to cntrol the spped of a small motor, 35 to 55 volts. Can any of the circuits be modified to handle this and can the pot be remote? Thanks Tom
behzad
TRIAC Light Dimmer
Wednesday, November 28, 2007 4:06:42 AM
hello sir,i want a dimmer circuit that works with 220 v and 2000w ,can you help me?
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