Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Please explain this...






jander6442

jander6442

0
Joined
Jan 8, 2009
Messages
3,145
Points
83
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.
 
TheDukeAnumber1

TheDukeAnumber1

0
Joined
Jun 7, 2012
Messages
1,683
Points
63
cantthinkofone said:
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
Click to expand...

Don't non-rechargeable CR2's not have protection circuits?
 
DrMario

DrMario

0
Joined
Oct 19, 2013
Messages
245
Points
18
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.
 
Last edited:
S

sarbanes

0
Joined
May 16, 2008
Messages
87
Points
0
jander6442 said:
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.
Click to expand...
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!!!! ;)
 
S

sarbanes

0
Joined
May 16, 2008
Messages
87
Points
0
jander6442 said:
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.
Click to expand...
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!!!! ;)
 
Last edited:
DrMario

DrMario

0
Joined
Oct 19, 2013
Messages
245
Points
18
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.
 
You must log in or register to reply here.




Top