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20 Watt LED Dimmer Circuit diagram

cjdelphi

Oct 26, 2011
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Even with a 555pwm setup, this won't work with 12v

He's using 20 one watt LEDS, that's quite a foward drop, you'd need to supply a higher voltage and then regulate the current..

Keeping in mind 555's get temperemental over 12v (the Chinese clones are lucky to work over 10v)
 

CDRIVE

Hauling 10' pipe on a Trek Shift3
May 8, 2012
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Getting info from the OP has been like pulling a T bone steak out of the mouth of a hungry Pit Bull but I think we do know that he understands a series - parallel array must be used. As for the Chinese clone issue,... I wouldn't know. In the far past I've used many 555's @ 15V with no issues.

Chris
 

Martaine2005

May 12, 2015
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I think I got the wrong flag!!!! Deleted.....
Oops, no I didn't.:)
Martin
 

Narendrakd

Dec 3, 2015
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I think I got the wrong flag!!!! Deleted.....
Oops, no I didn't.:)
Martin


hi martin

i want 20 watt with control dimmer pcb design and i try to find out on net but no luck so can u please make a pcb drawing for me.

i know how to make a pcb board.

narendra
 

Martaine2005

May 12, 2015
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Colin has supplied you with a perfect pcb design..
If you ask him nicely, he might show you the other side!!
If you do speak to Colin, you could ask him why it has 16 pins! 2x1, 2x2, 2x3, 2x4 etc...:)
 

duke37

Jan 9, 2011
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Simple pulse width modulation will flash the leds on and off. If this is done fast enough, the human eye averages the light.
What does your shark think? Will he have a migraine or a seizure?
 

Alec_t

Jul 7, 2015
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I suggest you read through the whole thread, make a list of the questions you have been asked, then answer each one carefully. Without those answers any circuit design we come up with would be unlikely to work properly. If you don't know the answer, say so. At least provide a link to the source of the LEDs where tech specs are available.
 
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