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Old 02-24-2009, 07:23 AM #1
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Default IR(808nm) hand held laser build

is it possible to build a high power burning hand held IR 808nm laser in a flashlight host like jayrobs diy green laser build or anything small enough to fit in your pocket??

what kind of driver would you need and what kind of batteries would you use??


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Old 02-24-2009, 05:14 PM #2
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Default Re: IR(808nm) hand held laser build

It's easily possible. You can use the same driver you would use for a Long-Die Open Can diode, set to about 250mA for a 200mW 808nm diode. Other than drive current, the only difference between an 808nm build and any red build is the diode's pin connections. You can find a datasheet for an 808nm diode here: http://stonetek.org/shop/images/808_200.jpg

The pin connections are the same for all 808nm 5.6mm diodes.
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Old 02-27-2009, 04:44 AM #3
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Default Re: IR(808nm) hand held laser build

can you boost the ma higher to push out atleast 500mw??
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Old 02-27-2009, 04:59 AM #4
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Default Re: IR(808nm) hand held laser build

You'd blow the diode.
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Old 02-27-2009, 01:10 PM #5
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Default Re: IR(808nm) hand held laser build

Buy a dx "true" 50, it has a 500mW 808nM 5.6mm or 9mm diode! then open it up and take the crystals out for a 500mW burner. Heres the "true" 50mW http://www.dealextreme.com/details.dx/sku.1371
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Old 03-03-2009, 06:49 PM #6
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Default Re: IR(808nm) hand held laser build

i want to get a 1watt (1000mw) diode. what driver could i use with the 1 watt IR diode??
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Old 03-03-2009, 07:11 PM #7
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Default Re: IR(808nm) hand held laser build

An LM317 driver with adequate heatsinking will drive a 1W diode..
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Old 03-10-2009, 06:16 AM #8
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Default Re: IR(808nm) hand held laser build

what kind of power source could i use with the LM317 driver, a 9volt battery??
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Old 03-10-2009, 06:33 AM #9
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Default Re: IR(808nm) hand held laser build

and how do you build a LM317 driver??
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Old 03-10-2009, 07:47 AM #10
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Default Re: IR(808nm) hand held laser build

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Originally Posted by flipinflopin
and how do you build a LM317 driver??

Start with an LM317, and the search bar... Lots of info awaits you
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Old 03-11-2009, 04:34 AM #11
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Default Re: IR(808nm) hand held laser build

i havent found a DIY for the LM317
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Old 03-11-2009, 08:27 PM #12
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Default Re: IR(808nm) hand held laser build

Quote:
Originally Posted by ben74
Buy a dx "true" 50, it has a 500mW 808nM 5.6mm or 9mm diode! then open it up and take the crystals out for a 500mW burner. Heres the "true" 50mW http://www.dealextreme.com/details.dx/sku.1371

what is the difference between a DX 50mW green and a "True 50mW green". are they measuring combined wavelengths or seperate?
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Old 03-12-2009, 04:34 AM #13
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Default Re: IR(808nm) hand held laser build

what kind of power source can the LM317 driver take??
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Old 03-12-2009, 05:44 AM #14
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Default Re: IR(808nm) hand held laser build

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Originally Posted by flipinflopin
what kind of power source can the LM317 driver take??

http://www.national.com/mpf/LM/LM317.html
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Old 03-12-2009, 11:45 AM #15
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Default Re: IR(808nm) hand held laser build

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Originally Posted by flipinflopin
i havent found a DIY for the LM317

Search for "DDL circuit". That's a common name for it here on LPF..
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Old 03-12-2009, 06:27 PM #16
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Default Re: IR(808nm) hand held laser build

i dont really know how to read the skimatics
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