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Kilo-Lumen bike headlight

Step 2Bill Of Materials

Electronics:
6 Cree XR-E (Q5-WC bin) LEDs mounted on carrier PCBs
<<<< Update - Technology marches on. I built this light back in August and since then Cree has come out with a new higher bin XR-E, the "R2" These put out up to 275 lumens versus 240 for the ones I'm using. Alternatively you can use the new MC-E which i 4 dies in a single optics package. Each one of these puts out ~700 lumens. A wide selection of optics exist now for that as well, and it is easier to drive than the SSC-P7 (another 4-die part). >>>>

1 BlueShark current driver
1 10 kohm potentiometer with built-in switch
1 barrel type connetor pair
1 hookup wire (I used 20 guage, 22 should suffice)

Mechanical:
1 package of Artic Silver Epoxy (not the grease, but the two part silver loaded epoxy
1 3 inch long section of 2" by 3" by 1/8" thick rectangular aluminum tubing
1 3" by 2" by 1" block of aluminum
1 3" by 2" by 1/4" plate of aluminum
1 3" by 2" by 50 mil sheet of aluminum
12 4-40 flat head 1/4" screws
1 bike mount
6 Lenses of your choice

For the Battery
1 Ryobi 18 volt battery
1 Ryboi 18 volt flashlight
1 Amphenol Power PowerPole connector pair
Silicone sealant
JB weld

For the taillight:
18 Lumileds Pirhana LEDs
1 Taskled CC1W current driver
1 scrap housing
1 piece of lexan or other suitable clear plastic
1 Silicone adhesive/sealent
a bunch of screws to hold it together

Suppliers:

LEDs and lenses: http://www.ledlightingsupply.com

BlueShark Driver: http://www.theledguy.com

Taillight Driver: http://www.tasled.com

Handlebar mount: http://www.planetbike.com

I bought the alumnium from a local metal supply place. I take a trip every month or so looking for interesting remnants and have a decent stockpile of pieces now. I designed the light to fit the materials I have. There's nothing special about the dimensions except that they lenses fit well.
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1 comment
Mar 22, 2011. 9:17 AMReble_45 says:
Looks like the store you got the LED's from might be out of business.

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Author:kc6qhp
I'm an electrical engineer. By day I design chips, by night I like making stuff that is unnecessarily complex.