a Shocking question: DIY LED and such

[ministry]

I have 3 LED CREE lights as described here:

http://www.cree.com/Products/pdf/XLamp7090XR-E.pdf">http://www.cree.com/Products/pdf/XLamp7090XR-E.pdf</a>

How should I wire them up to a power source?

From what I read I should do it in a series but I'm not sure of the voltage for the power supply, the amount of MA it should be rated for and what size resister to use to get the most lumens out of them?

They will be affixed to a CPU heatsink. Can you please give me some guidance?

 

[ministry]

wow, thanks for putting me on track:

Bin Code for the Light is:
XREWHT-L1-WG-Q5-0-01

Looking at the Product codes here:
http://www.cree.com/Products/pdf/XLamp7090XR-E_B&L.pdf">http://www.cree.com/Products/pdf/XLamp7090XR-E_B&L.pdf</a>

It is Q5 group of Cool White


To drive at QTY 3 @ 3.7V @ 1000mA

Using a 12V 1000mA I need a 1 ohm resistor on the negative side of the series that can handle 1000mW.


These will be mounted to an old PII heatsink with a Fan

Am I on track?

Solution 0: 3 x 1 array uses 3 LEDs exactly
+----|>|----|>|----|>|---///----+ R = 1 ohms

The wizard says: In solution 0:
each 1 ohm resistor dissipates 1000 mW
!! the wizard thinks the power dissipated in your resistors is a concern
together, all resistors dissipate 1000 mW
together, the diodes dissipate 11100 mW
total power dissipated by the array is 12100 mW
the array draws current of 1000 mA from the source.


BTW: Picked them up here:
[IMG]http://www.dealextreme.com/details.dx/sku.2394">http://www.dealextreme.com/details.dx/sku.2394</a>

 

[ministry]

dawgdude;212604 wrote: Haha I figured my battle cry might bring him around to help.

Werd, thanx!

Will this do the trick:

 

[ministry]

ares;212653 wrote: its 5w but its 56ohm, you want 1ohm, they should have it, look the same, different description

Ok, thank you very much, I went to a TV repair shop and they hooked me up with a 5w 1ohm friend.

I have a 12v 1500mA Power Supply, should it be OK? or do I need to find one closer to the original spec?

My instinct tells me its probably OK to be a little over on the AMPS, but this is a little more power than I'm used to working with and want this to go well.