light dimmer

Thread Starter

sasek

Joined Jan 3, 2010
64
hai all,

problem here is i want design a circuit of light dimmer. the concept i want to use is to control the light dimmer using pwm. could i do that??? if yes pls help me to find the basic concept to design the driver to read pwm signal then control the light. thanks 4 reading :)
 

Bernard

Joined Aug 7, 2008
5,784
Yes. Look below at similar threads. More information would help, V,I,W, application, type of control, type of light" bulb ".
 

SgtWookie

Joined Jul 17, 2007
22,230
Are you talking about controlling the intensity of LEDs or incandescent lamps being powered by a low voltage DC supply? If so, then yes; PWM is a good way to go.

If you are talking about mains AC powered lamps, then PWM is not the way to go.

Projects that are powered directly by the mains are not something suitable for beginners in electronics.
 

Bernard

Joined Aug 7, 2008
5,784
Using PWM on AC powered TRIAC will result in either ON or OFF[ 0% duty] as once triggered TRIAC will conduct a full half cycle, just to be triggered again on other half. Just buy commercial dimmer.
 

Thread Starter

sasek

Joined Jan 3, 2010
64
thanks Bernard it very help me,

before this i have try with LDR optocoupler and the result is same like u said, is it all optocoupler like that????.
 
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