I am no longer maintaining the electronics sections of this site. For an explanation, see the electronics contact page. If you need help, you can ask your question in The Forum.

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.

Schematic

This is the schematic of the TRIAC Light Dimmer

Parts


Part
Total Qty.
Description
Substitutions
R1 1 50K Pot
R2 1 15K 1/2W Resistor
C1, C2 2 0.068 250V Capacitor
L1 1 Lamp To Be Controlled (up to 350 watts)
L2 1 Neon Lamp
TR1 1 40502 TRIAC
MISC 1 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.

Back To Circuits Page | Mail Me | Search