AC Dimming

[Msizi]

Hello there. I want to build a circuit thats gonna dimm incadescent lights bulbs to 70% intensity. How do I do this??? Please Help.

 

[arhi]

let me google that for you

**broken link removed**
Tjaco's design graveyard
**broken link removed**

 

[Willbe]

Hello there. I want to build a circuit thats gonna dimm incadescent lights bulbs to 70% intensity. How do I do this??? Please Help.

(V/120v)^3.5 = 0.7, solve for V.

 

[Msizi]

Whats 3.5??

 

[Willbe]

Whats 3.5??

The brightness of an incand. bulb is proportional to the 3.5 power of the applied RMS voltage.

Incandescent light bulb - Wikipedia, the free encyclopedia
near the bottom