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.
Working:
The resister and capacitor are connected in series. The capacitor is made to charge through the 500K resistor. When the capacitor starts 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.
You can do this circuit and vary the illumination of the bulb.
Hope you all like this basic light dimmer circuit. Feel free to comment.
17 comments:
Is it ok if i replaced the potentiometer with LDR?
what is value of diac and triac
triac value bt136
what about the maximum load
can I replace 500k resistor with potentiometer
the resistor in there is a variable one.. if it wasnt , this wasnt a dimmer circuit at all
If potentiometer can be replaced by LDR so it can be normal or LDR of higher value to be used?
Wahat is the maximum load it can handle and can it be used for inductive loads.
Y usually Diac is used for triggering triac....?? can we apply d capacitor voltage directly to d gate f triac..??
WELL DONE --U HAVE CLEARED UP THIS DIAC /TRIAC MYSTERY ONCE AND FOR EVER
THANKU SO MUCH --
NOW --WHAT ON EARTH IS A THYRISTOR AND A SCR INRELATION TO DIAC /TRIAC ?
TAKEN YEARS OF SEARCHING FOR EXPLANATION OF DIAC /TRIAC RELATIONSHIP
& FUNCTION ----SUDDENLY YOUR VERY CLEVER CIRCUIT MADE IT SO CLEAR --
U R A SUPERSTAR -----WELL DONE--
NOW ----WHAT ON EARTH DOES A THYRISTOR DO ? OR SCR DO AS RELATED TO YOUR CIRCUIT -------CANNOT UNDERSTAND WHICH IS WHICH !!
Great circuit sir
Is this a blog series? If not, it should be. I would love to read the next installment on this subject. koglenlampe.dk
Please reported on your project information
This circuit is actually wrong and wont work. The load should be to ground and the R/C switched.
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