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XPE Light


Gary's picture

By Gary - Posted on 01 April 2009

What else is there to do on a wet Wednesday afternoon but a bit of light building.

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lozza6's picture

Looks fantastic mate!!!

cant wait to see it in action! Laughing out loud

GAZZA's picture

have you got a cnc machine in the shed???? Eye-wink

Brian's picture

Just curious, they look to be in series. Is this normal?

Paul's picture

Gary you missed your calling as Mr Mum, you should have been a boiler maker.

When they go on sale commercially, I'll have one.

lozza6's picture

@ 700ma this puppy needs 20.4V! Laughing out loud

Rob's picture

Actually Loz, the set here in my hand[1] is only pushing 18.7v across 6 XPEs. But you know that 'cos I told you yesterday! Sticking out tongue

[1]
Rob's Mk3 Light

lozza6's picture

can you confirm that it is actually pulling 700ma?

because according to the data sheet, at 700ma the Vdrop per LED should be 3.4V..............

http://www.cree.com/products/pdf/XLampXP-E.pdf

How come its nowhere near?

Rob's picture

Maybe I've got it set at 500mA? That would be amusing Eye-wink

I'm not removing the wires from the MaxFlex to test, but will check the programming later.

Don't forget the data sheet isn't all that accurate. You have to take heat and a whole load of other things into account.

Buck's picture

As Loz and Rob already know I also seem to be getting around that same voltage across 6 LEDs at the 700mA setting.

Damien's picture

I think I hear Betty calling my name.

Rob's picture

Or you could build 4 DIY jobbies for the same $$$. Less time in that sort of production line too Laughing out loud

Damien's picture

If I had the time and not the $$$ I probably would.

Rob's picture

Very nice Gary. <mumble>Bl00dy machinists!</mumble>

How come you didn't get XPEs mounted on square MCPCB though? It's sooooo much easier to build with Carlco 10x10mm lenses and square MCPCB.

Gary's picture

Thats just what cutter sent, I thought the rounds would end up being harder to work with and was going to send them back, but in the end they worked out ok.

craigs's picture

Does this rig have low beam when passing someone so they dont fall into their shadow?

Will the quest for more light in these mobile electric sunshine units see a limitation in output mandated or an etiquette put forward for large events?

Ok chill, its Friday, there is a big event with night riding this weekend and I am not serious.

We simply must have a light off at the Mont. Categories: Unlimited, Below 15V, Below 8V. Of course points for looks, engineering, efficiency.

lozza6's picture

Vin or Vout? Laughing out loud

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