A little 3W mod

I've just put a TWOJ together with a 1.2ohm resistor into my 123a*2 light:

Although ugly, it works well with the 20mm reflector. /ubbthreads/images/graemlins/smile.gif

sweeet. love the color.. it's funny.. i was so 'against' DD lights..

'til I built one myself: my micromighty test lights i built for laborday camping.

Simple.. elegant, beautiful and bright i'm sure (what current level is it running and what batteries)?

Nice mod Waion, but ya shoulda showed them pitchers in -- Reverse Order! /ubbthreads/images/graemlins/grinser2.gif

need BEAMSHOTS!!!! /ubbthreads/images/graemlins/smile.gif

Nice Waion! Nice spotty *white* beam!

It doesn't matter how it looks, what matters is how it functions! Very cool. Can't wait for the /ubbthreads/images/graemlins/kewlpics.gif(beamshots ie.)

Thank you! Here's the beamshot:


I don't know why the TWOJ mod on the left appears so reddish over the XM2. Anyway, it's very white to my naked eye.
With two middle-used 123a*2, it draws 740ma. With a 17670 li-ion that left the charger a month ago with some use, it draws 400ma only.

Looks good!

Maybe a tiny bit of the light is reflecting off of the red metal on the inside of the head... ?? Seems to have a lot of "spill" and maybe some of that light is hitting the red "lip".

Just a guess. /ubbthreads/images/graemlins/icon3.gif

/ubbthreads/images/graemlins/ooo.gif Nice photo. The lip point makes sense. To verify, tape it up and see what happens.

waion,i did something similar only with a pelican body and a 3x6.8ohms(1watt rated/parallel) resistors.Its equivalent to 2.23 ohms.

I got a 2.2ohms R initially(looks similar to yours), its rated 2watts so when i tested it, it got pretty hot fast and i switched it to 3x6.8 R 1watters to distribute power between.

Mine draws ~750ma on new disposable cells,as the voltage drops from the 6v rated cells under load.Theoratically at constant 6v source, it should give ~1.2amps.I've been using it with a 3.7v rechargeble along with a disposable one to pump up the current to 1.2amps.Theres much brighter light output to start with before it drops down the slope this way.So far so good. /ubbthreads/images/graemlins/smile.gif

yikes.. did i just read you are mixing a primary and rechargeable 123.. that's a little scary.. just drop the resistance... the lower the resistance the less power dropped on the resistor, so you can use a smaller rated resistor.. the AAA light i just made.. it only uses .1W resistors.. SMD style.. and it handles 1.7W ok.. just do the math and make sure that you won't start fires first.

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andrewwynn said:
yikes.. did i just read you are mixing a primary and rechargeable 123.. that's a little scary.. just drop the resistance... the lower the resistance the less power dropped on the resistor, so you can use a smaller rated resistor.. the AAA light i just made.. it only uses .1W resistors.. SMD style.. and it handles 1.7W ok.. just do the math and make sure that you won't start fires first.

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i only figured that the voltage will drop when i finished the mod.its all sealed up now/ubbthreads/images/graemlins/icon23.gif.Ive been testing the rechargeble on a dmm before and after charging and monitoring it closely....just incase something unexpected does happen but right till now it seems ok. /ubbthreads/images/graemlins/smile.gif
Putting new cells in it works but output is lesser and starts dropping off from there,its not as bright as i hoped it to be.

This is what i made...its all sealed up