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Robinhood150
Body Damage is Cool


Reged: 08/28/01
Posts: 1520
Loc: Wandering around Phoenix
Re: Wiring LEDs, the right way.
      11/09/06 10:05 PM

Yeah, that's the diagram I started out with, but modified it as I did testing. With only 1 lux everything got really hot really quick. So instead of one luxeon I used two and found that everything still heated up but it was better. So then I threw in a big resister in with the 2 LEDs to dissipate more power and that brought down the temps to a resonable value.

Forward voltage for 1w lux is 3.4V and the 3w is 3.6V. I've done the calcs for the 1w so the problem I run into with wiring up for 3 watt LEDs is the heat. I've got twice the power going through at 700mA so how do I compensate for that? Yeah, I can run 2 LEDs, but I don't know if a big resister in series is going to be enough to keep the temps down. I'm trying to find a different circuit or IC that can handle the current and keep the temps down. I know high end flashlights use pulse modulation but that's too advanced for me.

Alternatively, a company called Cree has come out with a new LED that blows away the 5w luxeon and it only pulls around 300mA. I might have to do some experimenting with those, but they're not cheap at $15 each.

--------------------
Steve
My Website ||Gettin' off 4wheel drive club member
'93 4Runner V6 4x4 auto tranny
If you have to ask about a SAS, you're not ready for it.

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Entire topic
Subject Posted by Posted on
* Wiring LEDs, the right way. BoostedInline6 11/04/06 06:23 PM
. * * Re: Wiring LEDs, the right way. Robinhood150   11/05/06 11:57 PM
. * * Re: Wiring LEDs, the right way. BoostedInline6   11/06/06 11:03 AM
. * * Re: Wiring LEDs, the right way. Robinhood150   11/06/06 03:46 PM
. * * Re: Wiring LEDs, the right way. BoostedInline6   11/06/06 05:32 PM
. * * Re: Wiring LEDs, the right way. Robinhood150   11/07/06 12:36 AM
. * * Re: Wiring LEDs, the right way. ScottFW   11/07/06 04:50 PM
. * * Re: Wiring LEDs, the right way. Robinhood150   11/08/06 07:44 PM
. * * Re: Wiring LEDs, the right way. BoostedInline6   11/09/06 05:58 PM
. * * Re: Wiring LEDs, the right way. Robinhood150   11/09/06 10:05 PM
. * * Re: Wiring LEDs, the right way. BoostedInline6   11/13/06 12:55 PM
. * * Re: Wiring LEDs, the right way. BoostedInline6   11/17/06 03:14 PM
. * * Re: Wiring LEDs, the right way. kewlynxModerator   04/15/07 11:22 PM
. * * Re: Wiring LEDs, the right way. 52degrees   11/05/06 03:56 PM

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