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Old 07-12-2011, 08:46 PM #353
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Default Re: NJG-18, multimode boost driver for 445nm.. and possibly 650nm

Its always a pain presetting them for customers. I never know how many I will go through until I have one that works correctly, especially with operational modes.

Heh. I have already gone through 3 bad ones until I had a driver that output the desired current, didn't explode, and had clean modes. Lol.


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615mw 405nm/12X Spiderfire X-03
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Old 06-04-2012, 10:42 PM #354
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Default Re: NJG-18, multimode boost driver for 445nm.. and possibly 650nm

Little update. Looks like DX has some back in stock again.
3W 19-Mode Universal Regulated Circuit Board for Flashlights - Free Shipping - DealExtreme
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Old 06-04-2012, 11:21 PM #355
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Default Re: NJG-18, multimode boost driver for 445nm.. and possibly 650nm

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Originally Posted by DTR View Post
Thanks

ordered some!

greetings,,
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Old 06-29-2012, 05:59 AM #356
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Default Re: NJG-18, multimode boost driver for 445nm.. and possibly 650nm

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Why do you guys dislike CR123s so much out of curiosity? I would think that would be the solution to your voltage issue per size. Here is some basics regarding the names of most used type of power supplies. Sorry if you already know all this.

Lastly there is a course linear. Linear is always "buck" and can have a dropout as low as .1V per amp. Maybe lower. So with a linear driver you could supply 2-3A at 3.7ish volts. 18650s measure 4.2V out of the box right? (my first are being shipped out right now for driver development). So you could theoretically pump 2As through a 445nm diode with a linear driver, your voltage though would still be 3.7V. Not sure what happens at that point but i'd assume the diode wouldn't be nearly as bright as pumping 2A at 5V.
The RCR123 cells are more limited in storage capacity for the same volume.

Two RCR123 cells output ~850 mah @ 8.4 VDC

vs.

One Panasonic 18650 outputing 3400 mah @ 4.2 VDC.
(twice the energy capacity)

On the 445nm diode, 3.7 VDC is NOT enough voltage for 2 amps of current.

On my direct-drive 445nm laser it takes ~ 4.2 VDC for 600ma.

5 VDC or more is required for most 445nm diodes.

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Old 12-19-2012, 12:38 AM #357
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Default Re: NJG-18, multimode boost driver for 445nm.. and possibly 650nm

Despite the notion that these might have been discontinued, FastTech have them in stock here: $3.87 AA/AA/Ltihium 5-Mode 3A LED Flashlight Driver Circuit (NJG-18) - 0.8~7V input / adjustable 2~7V output / 17mm at FastTech - Worldwide Free Shipping

I have ordered a few and would love to test them out.

Cheers!

Edit: Looks like they're sold out everywhere else, even DX.
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Old 12-19-2012, 01:27 AM #358
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Default Re: NJG-18, multimode boost driver for 445nm.. and possibly 650nm

thanks mate ive got 10 ordered
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Old 03-18-2013, 01:07 PM #359
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Default Re: NJG-18, multimode boost driver for 445nm.. and possibly 650nm

i got a 1w 808 it nead 2.2v to 2.6v at 1.5a i nead a driver i wont to run it on a 3.7v
Coherent 1W 808nm High Power Burning Nd YVO4 Yag Pump Laser Diode Module Tube | eBay
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