Electronic – Replace potentiometer with resistor

acdimmerpotentiometertriac

Can I replace the potentiometer in this AC dimmer circuit with a fixed resistor so that I can get a permanent dim setting?. If yes then how.

enter image description here

Components in this circuit are
The parts used are

WH149-500k potentiometer
DB3 bidirectional diode
2k resistance 0.25W
MAC97A6
104 630V CBB capacitor

Edit.
here is the picture of the pcb kit. The pot has 4 legs??
enter image description here

Edit.
I'm adding another circuit which should be clearer.
enter image description here

Best Answer

If you want to maintain the capability to turn the light fully off you will want to either retain the switch part of the pot (that is the two terminals that stick out the back of the pot) then it does not make sense to remove the entire pot.

This portion of the schematic represents the On/Off switch in the POT.

enter image description here

I did not study the PC board artwork configuration but appears that the side of the POT switch that is away from the AC Line is internally connected to these terminals of the circuit diagram:

enter image description here

Related Topic