Dimmer Switch Circuit Diagram Simple. A device like this should only be used with an incandescent light fixture and not with a ceiling fan or other motor. A triac is a small semiconductor device similar to a diode or transistor.
The circuit is based on the principle of power control using a triac the circuit and design are the same for fan or light the only difference is the output load to be varied that is fan or light. This might seem intimidating but it does not have to be. In the last section we saw that a dimmer switch rapidly turns a light circuit on and off to reduce the energy flowing to a light switch.
In the diagram below a 2 wire nm cable supplies power from the panel to the dimmer box.
This schematic diagram shows an automatic headlight dimmer circuit for your car s headlight keep you safe in the dark with maximum bright for farthest visibility but will automatically switch from high to low beam when traffic approach to save others sight. Mount the btb12 triac on a little heatsink as you can see in the pictures above. In the diagram below a 2 wire nm cable supplies power from the panel to the dimmer box. The circuit diagram presented above is an classic illustration of a dimmer switch where a triac continues to be employed for managing the depth of light.
