simple lamp dimmer 220v using triac

Posted on Feb 7, 2014

A very simple dimmer circuit with only the essentials. (In this circuit, the values are given for a BT138 at 220V AC, for 115V AC you may have to experiment with the values. ) R1 can vary from one triac to another, put a 220K © trimmer in its place and adjust. After adjustment, measure the result and replace the trimmer with an ordinary resistor of

simple lamp dimmer 220v using triac
Click here to download the full size of the above Circuit.

the same value.

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