What driver is this?

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Haggai
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What driver is this?

This is the driver from my FocalPrice Sipik SK58:

 

Some buck/boost driver?

Can work with both AA and 14500?

Did they really solder it so ugly and connected the red to the negative?

Budgeteer
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Probably just boost driver that rely on Vf of the led to limit current somehow. To tell if it is a good buck/boost you should be able to get very uniform and stable brightness level until the battery is severely drained.

kragmutt wrote:

They're gonna send you a green redcat with a black LED.

arenat
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Is the same the C78 has, if the resistor which is under the red wire is R270 probably work fine with li-ion (almost direct drive ,1,7A)

Those are optimized to work with two 1.4 cells given around 800 ma well regulated , with one cell the output is around 550ma as most boost available, good driver

Haggai
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Will it work well with http://www.dealextreme.com/p/cree-q5-wc-led-emitter-with-16mm-base-11022 ?

I guess focusing won't be great and flood may be lacking, as the lens fits the OSRAM led, but I hope it will be good enough.

 

(do you have any other emitter recommendations? needs to be 16mm base)

arenat
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I have this c78 from fp and the 'legit' one...I swap the emitters with not luck, have several xr-e at hand, not focus well and the improve in brightness is not noticeable at all...finally gave it away with all  original....don't spend money in that body since you are constrained for the lack of thermal disipation...if you want more current output with single 1.5 cell you can ad a .22 ohm in paralel with the existing one, however you can't use it with li-ion anymore..

arenat
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Sorry, I forgot you got a bad diode, it's not a osram the die is but the package not, i have some ideas for you but the site which i want link is not working, stay tuned..

Haggai
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Ok, thanks, I'll wait for your input before I buy anything..

arenat
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You must consider this one which match the optics , also the warm ones are very nice, the best tint ever...

http://www.lck-led.com/p821/3W-High-Power-White/Warm-White-LED-w/-16mm-A...

Since the shipping cost of around 2.5 is the same up to 100 grs this one could interest you, I have one one the way right now..

 

http://www.lck-led.com/p544/5mm-UV%28365nm%29-LEDs---1PC,-40MCD,-1-2mW/p...

Haggai
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The power LEDs are about 40-50lm/W, much less than the CREE Q5, right? And since the torch will work at ~1W most of the time (1.2v from AA, probably 1A with the driver), I think I won't get much of it with these LEDs.

(and regarding the 365nm LEDs - I've already ordered a Nichia 365nm based flashlight from Manafont, so I don't need them, but thanks anyway)

Haggai
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Ok, since this is a "just for fun and usefulness is bonus" project, what do you think about the following options?

Remember the driver draws about 1A (at the tail) for the old OSRAM LED, which I guess will be quite close for other LEDs. Are we talking about ~1A to the emitter or something close to 700-800mA?

 

Q5 WC - http://www.dealextreme.com/p/cree-q5-wc-led-emitter-with-16mm-base-11022

XP-G R5 - http://www.dealextreme.com/p/cree-xp-g-r51b-7000k-350lm-emitter-with-16mm-base-44306

XM-L T6 - http://www.dealextreme.com/p/xm-lt6-885lm-led-emitter-6000k-white-light-bulb-3-0-3-5v-50599

XM-L U2 (??) - http://www.dealextreme.com/p/xml-u2-1c-320lm-7000k-led-white-light-emitter-with-16mm-base-3-7v-57008

 

I know the XP-G and XM-L options will have bad throw and who-knows-how-good flood, but the Q5 itself doesn't really fit for the lens, so maybe all of them have similar start point with regard to throw/flood quality.

I think the XM-L won't give me much edge over the XM-Ls at this amperage, so it's really basically Q5 or XP-G, right?

arenat
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250-350 mA
Haggai
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arenat wrote:
250-350 mA

30% efficiency?

arenat
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1.2x1=1.2W X 80% eff =.96W 3.3X.3=.99W
Haggai
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oops, right.

So, at 350mA XP-G R5 gives about 50% more lumens than XR-E Q5 (according to http://www.dealextreme.com/forums/Forums.dx/Forum.-209~threadid.530221), almost twice that of the P4 I compared this light to in another thread, which is way more than the original OSRAM led.

Well then, I think I'll go for the XP-G and see how it goes. Smile