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jeremyb
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Joined: Jan 12, 2003
Posts: 32,883
Location: Derailled
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 Posted: Wed 28/Feb/07 1:28pm Post subject: Building L E D Night Lights |
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I'm building my new lights with a triple Cree in it, 240 lumens and 6.6 hours on a 2000Ah NiMh pack made from 10xAA's 
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Tojja
Scuffed
Joined: Mar 04, 2005
Posts: 345
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| Posted: Wed 28/Feb/07 1:31pm Post subject: |
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| jeremyb wrote: | | I'm building my new lights with a triple Cree in it, 240 lumens and 6.6 hours on a 2000Ah NiMh pack made from 10xAA's |
Me too. Cheapest source for Cree XR-E's I have found, FYI, is DealExtreme: http://www.dealextreme.com/details.dx/sku.1302
(note that price *includes* shipping)
Optics: I plan to get from Cutter in Aus; Driver boards from TaskLED - either nflex, bflex or ??? (pricey but oh-so-configurable).
http://www.taskled.com/bflex.html
if you haven't ordered your supplies already Jeremy, I'd be keen to share postage.
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jeremyb
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Location: Derailled
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Tojja
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Joined: Mar 04, 2005
Posts: 345
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| Posted: Wed 28/Feb/07 1:44pm Post subject: |
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Saw the eBay ones - 30 degree beams is a little too much spread for offroading IMHO. Also no flexibility for dimming etc. But keen to see how you go.
I already have AA batteries galore (2500mAh+) - eBay great for those. Now to just chuck them together...
Smart charger is a good link - ta!
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jeremyb
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| Posted: Wed 28/Feb/07 1:46pm Post subject: |
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Didn't notice the 30deg bit, Danose has a backup plan to hopefully get ~500 lumens 
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Tojja
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Joined: Mar 04, 2005
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| Posted: Wed 28/Feb/07 1:52pm Post subject: |
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500 lumens very achievable (especially with 3 x). But this will require driving at 1A and will thus require good cooling...
I am planning on hitting 550 lumens through driving three Cree's at 1A. From what I read pegging them back to 50-75% power is still mental amounts of light, thus the attraction to a good dimming circuit. My spreadsheet for this is below
(Battery life takes into account NiMH discharge curves at various A rates - 10 x 1.2V 2500mAh batteries)
(Driver circuit is >85% efficient)
Last edited by Tojja on Wed 28/Feb/07 1:56pm; edited 1 time in total |
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jeremyb
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| Posted: Wed 28/Feb/07 1:54pm Post subject: |
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Oooh, make sure you post up lots of pics and progress!! 
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philstar
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Joined: Mar 05, 2006
Posts: 1,584
Location: Auckland, Mt eden
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| Posted: Wed 28/Feb/07 2:08pm Post subject: |
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they are 3x1W 
has anyone seen a MR11 one of these ? obiously only single LED.
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honeymonster
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Joined: Apr 22, 2004
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| Posted: Wed 28/Feb/07 2:10pm Post subject: |
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 this was an interesting thread, then it went all geeky on us 
I have the Nightlightning Blaast - very happy with it. I
'd be able to do a light/beam comparison with these Ayup ones if anyone is keen.
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danose
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Joined: May 27, 2004
Posts: 10,605
Location: Nose City
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| Posted: Wed 28/Feb/07 2:11pm Post subject: |
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| Tojja wrote: | | 500 lumens very achievable (especially with 3 x). But this will require driving at 1A and will thus require good cooling... |
ssshhh - the plan was to not tell JB about that to later, it was going to be part of his training ("and if you ride too slow, your head catches fire" )
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danose
Mangled
Joined: May 27, 2004
Posts: 10,605
Location: Nose City
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| Posted: Wed 28/Feb/07 2:12pm Post subject: |
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| Tojja wrote: |
I am planning on hitting 550 lumens through driving three Cree's at 1A. From what I read pegging them back to 50-75% power is still mental amounts of light, thus the attraction to a good dimming circuit. My spreadsheet for this is below
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try emailing eric at nightlghtning - he's happy to sell parts to diy'ers - so you could use the funky aluminium finned housing for the endurenz (which would give plenty of cooling)
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Grapefruit
Wrecked
Joined: Feb 27, 2006
Posts: 5,397
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| Posted: Wed 28/Feb/07 2:13pm Post subject: |
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| honeymonster wrote: | this was an interesting thread, then it went all geeky on us
I have the Nightlightning Blaast - very happy with it. I
'd be able to do a light/beam comparison with these Ayup ones if anyone is keen. |
any links to that nighlighting blaast for info / prices???
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danose
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Joined: May 27, 2004
Posts: 10,605
Location: Nose City
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| Posted: Wed 28/Feb/07 2:14pm Post subject: |
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| Grapefruit wrote: | | honeymonster wrote: | this was an interesting thread, then it went all geeky on us
I have the Nightlightning Blaast - very happy with it. I
'd be able to do a light/beam comparison with these Ayup ones if anyone is keen. |
any links to that nighlighting blaast for info / prices??? |
http://www.nightlightning.co.nz/endurenz%20details.htm
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Tojja
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Joined: Mar 04, 2005
Posts: 345
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| Posted: Wed 28/Feb/07 2:23pm Post subject: |
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Yes, but that is at 350mA - drive them at 3 times that (this is sanctioned by Cree BTW, under the right conditions) and you have 3 x 3W LEDs...
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try emailing eric at nightlghtning - he's happy to sell parts to diy'ers - so you could use the funky aluminium finned housing for the endurenz (which would give plenty of cooling) |
Ta for suggestion - will see what they can do re: dimming circuits. Keen to make the housing myself however - work on a site with a substantial workshop, CNC rigs everywhere. Reinventing the wheel has never been so much fun :P
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Grapefruit
Wrecked
Joined: Feb 27, 2006
Posts: 5,397
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| Posted: Wed 28/Feb/07 2:24pm Post subject: |
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so am i right in thinking then
to get Endurance DCM made up is $319 each?
then add in the ONE battery and charger $258
and an in car adaptor $36
and a handle bar mount $18.95
and helmet adaptor $8.95
wow, pricey!
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