Really small Luxeon torch (pix!)

Overclocker · Dec 10, 2005

Luxeon 1W emitter:

Simple resistor. L-shaped aluminum conducts heat from the Luxeon to the plastic case. Thermal grease between aluminum and Luxeon:

Lens made from a 10mm LED to focus it a bit. Clip attaches to my holster so it's always with me. Small size makes it completely unobtrusive:

Plugs into the charger port (which is also DC out) of an Ericsson:

MillerMods · Dec 10, 2005

Neat idea. It looks like it didn't focus the beam as much as I would expect it to. How much current does it draw? Does it get hot?

HarryN · Dec 11, 2005

Nice - tight soldering job. I have some 1206 size surface mount power resistors in 2 and 10 ohm if you decided you want to shrink it even more.

Overclocker · Dec 11, 2005

Sorry about the 4th picture, that was WITHOUT the lens.

Here's a beamshot compared to a really cheap 2AA:

I'm not sure about the current but it's a 10ohm resistor. It gets a bit warm.

I'm planning to improve the thermal dissipation by using an aluminum case instead of the plastic case. I could then put a lower value resistor...

MillerMods · Dec 11, 2005

Nice! It gives the phone 2 good reasons to take up residence in your pocket. That's a nice Li-ion EDC.

nerdgineer · Dec 11, 2005

Cool idea. Like MillerMods, I'd be interested to know how much current it drew from the phone battery. Also, I don't know if this usage bypasses the Li-Ion battery protection on the phone in which case you could risk overdischarging your expensive phone battery with this light.

If protection was retained, this would be a very nice usage indeed. Also a 5mm version with longer run time would be very nice.

Haz · Dec 11, 2005

That's a great idea, and it's looks surprisingly bright too, excellent work

Overclocker · Dec 11, 2005

nerdgineer said:
Cool idea. Like MillerMods, I'd be interested to know how much current it drew from the phone battery. Also, I don't know if this usage bypasses the Li-Ion battery protection on the phone in which case you could risk overdischarging your expensive phone battery with this light.

If protection was retained, this would be a very nice usage indeed. Also a 5mm version with longer run time would be very nice.

Protection is retained, and I've upgraded the phone battery to 1000mAh (up from 700).

Really small Luxeon torch (pix!)

Overclocker

Flashlight Enthusiast

MillerMods

Flashlight Enthusiast

HarryN

Flashlight Enthusiast

Overclocker

Flashlight Enthusiast

MillerMods

Flashlight Enthusiast

nerdgineer

Flashlight Enthusiast

Haz

Enlightened

Overclocker

Flashlight Enthusiast

Similar threads

Latest posts