I just tried to use Triac circuit to dimmer the bulb which can't using that way, it was burned out and cost me about US$ 12.

Where did a triac come into this question about a potentiometer?

 

Where did a triac come into this question about a potentiometer?

Nothing, I just followed what the Metalmann said.

If you want to find one, yes, the Triac dimmer circuit need a potentiometer to adjust the brightness, power, speed control.

You can google "triac dimmer".

 

Nothing, I just followed what the Metalmann said.

If you want to find one, yes, the Triac dimmer circuit need a potentiometer to adjust the brightness, power, speed control.

You can google "triac dimmer".

Don't follow anything I say.

 

Where did a triac come into this question about a potentiometer?

The real problem is not the potentiometer, did you see the whole contents of this thread?