Light dimmer circuit using DIAC and TRIAC


Posted on Feb 7, 2014

Light dimmer circuit is using to adjust the illumination of lamp. The below circuit shows the basic TRIAC triggering circuit using DIAC. Here in this circuit the light illumination is controlled using TRIAC and DIAC. The resister and capacitor are connected in series. The capacitor is made to charge through the 500K resistor. When the capacitor st


Light dimmer circuit using DIAC and TRIAC
Click here to download the full size of the above Circuit.

arts charging and when it reaches above the breakover voltage of DIAC, it starts conducting. Hence capacitor voltage is applied to TRIAC gate and it turns-on. The charging of the capacitor can be controlled by the variable resistor. Which indirectly controls the firing delay of TRIAC.




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