Modified lamp dimmer circuit
Description.
This is a modification of the circuit Simple Lamp Dimmer/Fan Regulator previously posted here. The working of the circuit is same as that of the previous, but in addition a snubber circuit consisting of resistor R4 and capacitor C3 is included to improve the performance of the triac T1. A fuse is also included for better safety. I think this is the better circuit to try .
Circuit diagram with Parts list .
Notes.
- No matter how what ever may be the load lamp,fan , heater or anything it should be rated less than 200 Watts.
- No matter how what ever may be the load lamp,fan , heater or anything it should be rated less than 200 Watts.
- Assemble the circuit on a good quality PCB or common board .
- Almost all parts of the circuit are live with potential shock hazard.Be careful.
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please give a diagram
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What is the wattage suggested for R4?
Hello,
Could you please give a method of calculating the values of components such a R1, because i have a welding transformer with dimmer placed into the primary, and this R1 was burn and i can not know the most correct value, i have also tested many Resistance in serial with pot 47K even i changed with 100K but it doesn’t work, could you please help me.
Best Regards
Hicham