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Old 10-30-2013, 07:47 AM #17
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Default Re: Please explain this...

Where did you get the laser? I've seen foreign objects rolling around in electronics.



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Old 10-30-2013, 09:23 AM #18
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Default Re: Please explain this...

My guess is the reverse protection circuit on the driver poofed as you put the battery in backwards it will work as you see, but never put those cells in wrong again or you surely will fry the driver because that protection is gone now.
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Old 10-30-2013, 11:33 AM #19
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Default Re: Please explain this...

Jander: that's what my electrician buddy's guess was. Point taken! Thanks
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Old 10-30-2013, 02:31 PM #20
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Default Re: Please explain this...

Quote:
Originally Posted by cantthinkofone View Post
Problem is these are non rechargeables. I believe cr2s. I've come to the conclusion that it was the batteries protective circuit that fried. Thanks guys! Also I don't know if this means anything but mine warms up really fast. Like heat wise. Lasers fine and all. But after like a 5 minute or so use it def warmer. Never mind the heat thing. Turns out it's from me not the laser. I worry too much
Don't non-rechargeable CR2's not have protection circuits?
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Old 10-30-2013, 06:02 PM #21
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Default Re: Please explain this...

Dont worry! I've memorized proper battery insertion and am taking it very seriously.
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Old 10-30-2013, 06:09 PM #22
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Default Re: Please explain this...

Magic smoke dont worry about it
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Old 10-30-2013, 06:49 PM #23
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Default Re: Please explain this...

Don't use mismatched primaries.

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Old 10-30-2013, 10:54 PM #24
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Default Re: Please explain this...

TheDukeAnumber1, not really - mostly PTC and pressure-sensitive circuit breaker, that's about it.

And, yes - definitely diode. Personally, I would rather not to put diode in series of the battery circuit instead of parallel as that would be silly and a hazard. Parallel = serial is what I would prefer, low chance of magic smokes.
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Old 11-11-2013, 02:16 PM #25
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Cool Re: Please explain this...

Quote:
Originally Posted by jander6442 View Post
My guess is the reverse protection circuit on the driver poofed as you put the battery in backwards it will work as you see, but never put those cells in wrong again or you surely will fry the driver because that protection is gone now.
When do you think the protection got toasted? A few ms after power up? Or maybe .27349695 sec after power up and poof of smoke? See, by the theory that by placing your cell in body negative now, you will burn out the diode, it would therefore also seem that you lucked out big time! A few more MS, and by by diode. Using above premise, this seems to be an unlikely happenstance. I'd guess there's more going on. Not too sure I'd want
to that ow t!

Did you notice any burnt metal spring, or a slight to moderate power drop post incident?

I'm really glad your laser still works. Treat her with extra special care!!!!
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Old 11-11-2013, 02:27 PM #26
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Cool Re: Please explain this...

Quote:
Originally Posted by jander6442 View Post
My guess is the reverse protection circuit on the driver poofed as you put the battery in backwards it will work as you see, but never put those cells in wrong again or you surely will fry the driver because that protection is gone now.
When do you think the protection got toasted? A few ms after power up? Or maybe .27349695 sec after power up and poof of smoke? See, by the theory that by placing your cell in body negative now, you will burn out the diode, it would therefore also seem that you lucked out big time! A few more MS, and by diode.

Did you notice any burnt metal spring, or a slight to moderate power drop in light output, post incident?

I'm really glad your laser still works. Treat her with extra special care!!!!
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My laser museum is too big to mention here. Here is a representation of some of my favourites,
180mW 405nm
296mW 405nm, Fuckus-able
1237mW 445nm, 2xCR123a's or single 18650 (half power), flex drvr. Case-.
2047mW 445nm Yobresal, 2x CR123a's, or single 18650 (half power), flex drvr. Case -.

~785mW (infra-red not included) 532nm T-Mart single 18650, case+.
189-225mW (infra-red IS included) 532nm “DX-200”, 18 pointers, all case -, using 2xAAAcells.
5-10mW, numerous 532nm lasers, mostly case- w/ 2AAA2s
<80mW 589nm CNI Case+, single 18650.
381mW 638nm (peak) Mitsubishi, single 10440, case -. MXDL (small flash light) host.
<5mW 632.8nm Laserex LLP-100, 1st HeNe pointer using 2x9V cells.
<1mW 635nm Laserex LDP-100, 1st solid state HeNe like pointer using 2x9V cells.
<5mW 634nm Lyte Optronics. 1st Solid State, HeNe like pointer using 2xAAAA cells. Case-.
<5mW 650nm Lyte Optronics. Early pointer using 2xAAAA cells. Case-.
250mW 650nm DX-”Dilda”, Fuckus-able.
311mW 653nm custom in old Laserex, LDP-300 host. Case-, using 2xAAA cells.
<5mW 685nm Laserex LDP-300. 2nd commercially available solid state laser pointer-in small pen like host. Case-, utilizing 2xAAA cells.
<1mW 670nm Laserex LDP-150V. 1st commercially available solid state laser pointer, period. Uses 2x9V cells. Although it is solid state, the host is identical to the large HeNe LLP-100.

Last edited by sarbanes; 11-11-2013 at 02:31 PM. Reason: Small gramatical correctionx;)
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Old 11-11-2013, 02:59 PM #27
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Default Re: Please explain this...

Depending on the diode size. If pretty small, the Zener diode has virtually no chance of protecting the driver / laser diode, it will simply get incinerated due to the ampere rating of the battery. It may happen instantly or just take a few seconds before the diode decides to call it quits.
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