Light Dimmer Schematic

I have this light dimmer circuit, when I plug it into the AC, the dimmer works fine but I noticed that the heat in potentiometer is increasing, is there any workaround to fix this problem?


closed as unclear what you're asking by Andy aka, pipe, Dmitry Grigoryev, Sparky256, Finbarr Sep 14 '18 at 10:17

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    \$\begingroup\$ Sure it is, to study a little better about dimmer circuit, yours is totally wrong. \$\endgroup\$ – Marko Buršič Sep 13 '18 at 6:15
  • \$\begingroup\$ I actually did that without any idea of how light dimmers work, my bad. But I'm open for suggestions :). \$\endgroup\$ – user8141558 Sep 13 '18 at 6:26
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    \$\begingroup\$ Do you actually mean that this is a tested and working circuit? \$\endgroup\$ – pipe Sep 13 '18 at 7:23

Common potentiometer are not designed to serve as a load or dissipate power, as in your circuit.

You need a proper dimmer circuit as an example below.


Note that is not isolated and might be hazardous. You rather use an isolated circuit, search on Google isolated dimmer circuit.

Note: You can buy very cheap off the shelve dimmer as well. Although this will only work with incandescent and halogen lamp and not LED light unless they are specifically designed to be dimmed.

  • \$\begingroup\$ "..not LED light unless they are specifically designed to be dimmed" and even then not necessarily, in my experience. Had to buy new dimmers. \$\endgroup\$ – Spehro Pefhany Sep 13 '18 at 12:46

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