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Old 06-22-2015, 01:20 PM #1
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Default 532nm help..?

So I have this cool 532nm laser out of a laser diffraction decoration light or party thing.. And well I wired it with 3 AAA batteries, turned on and looked to be about 30mw ish in power. I then tried ripping an 18650 out of a power bank. When I tried wiring it up to that it never lit up.. Tried the AAA battery pack and it still didn't light up. Did I fry the laser..?


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Old 06-22-2015, 04:09 PM #2
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Default Re: 532nm help..?

Sounds like the driver to me.
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Old 06-22-2015, 07:43 PM #3
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Default Re: 532nm help..?

were the AAA's in series or parralel? i think the difference in voltage may have had an effect, but im terrible with electronics so im not sure.

im better at optics than electronics.
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Old 06-22-2015, 09:25 PM #4
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Default Re: 532nm help..?

If those 3 AAA's were in series, then you should have been fine. Check the 18650 if it's charged or not

If the 3 AAA's were in parallel, then you probably fried the driver
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Old 06-22-2015, 09:37 PM #5
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Originally Posted by hwang21 View Post
If those 3 AAA's were in series, then you should have been fine. Check the 18650 if it's charged or not

If the 3 AAA's were in parallel, then you probably fried the driver
They were in series. At 1.5v each an 18650 is near that same voltage. The laser will just not light up. With either of the batteries. I don't see what I did unless 4.2 ish volts from the 18650 was too much..

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Old 06-23-2015, 02:08 AM #6
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They were in series. At 1.5v each an 18650 is near that same voltage. The laser will just not light up. With either of the batteries. I don't see what I did unless 4.2 ish volts from the 18650 was too much..
Did you put the polarity of the battery correctly?
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Old 06-23-2015, 02:22 AM #7
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Did you put the polarity of the battery correctly?
I could have put it backwards but I tried every way.
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Old 06-23-2015, 07:15 AM #8
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Default

I don't see how 4.5 volts (3x1.5v) was fine but 4.2 volts killed it. :/ I'm afraid to try the 18650 on the other two 532s I have.

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Old 06-23-2015, 07:17 AM #9
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Default Re: 532nm help..?

18650 is 3.7V not 4.5v i beleive, but you proabably fried it if you mixed up the polarity

also, try not to post twice in a row.
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Old 06-23-2015, 07:33 AM #10
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Originally Posted by micheal rosen View Post
18650 is 3.7V not 4.5v i beleive, but you proabably fried it if you mixed up the polarity

also, try not to post twice in a row.
I was saying my series AAA batteries are 4.5v and 18650 is around 3.7 volts. But mine just hopped right off the charger which at full capacity is at 4.2 volts.

Did reverse polarity break the driver or the laser?
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Old 06-23-2015, 07:39 AM #11
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Default Re: 532nm help..?

Quote:
Originally Posted by AutisticArch View Post
So I have this cool 532nm laser out of a laser diffraction decoration light or party thing.. And well I wired it with 3 AAA batteries, turned on and looked to be about 30mw ish in power. I then tried ripping an 18650 out of a power bank. When I tried wiring it up to that it never lit up.. Tried the AAA battery pack and it still didn't light up. Did I fry the laser..?
ah i see (about the battery) but i have no idea about what you fried. its likely to be the driver, however if its just a cheap module it may have been both the laser and the driver, but i have no idea, i really shouldnt be talking since i am not the best with electronics.
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445nm 1300mw
405nm BDR-209 16x @ 0.6A, S1 lens, 501B LED'ed

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Old 06-23-2015, 07:42 AM #12
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Originally Posted by micheal rosen View Post
ah i see (about the battery) but i have no idea about what you fried. its likely to be the driver, however if its just a cheap module it may have been both the laser and the driver, but i have no idea, i really shouldnt be talking since i am not the best with electronics.
Hmm. You think it'll be fine if I use the 18650 on the other modules but make sure the polarity is correct..? I don't want another one to go bad lawl.
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Old 06-23-2015, 09:22 AM #13
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Default Re: 532nm help..?

Now wait a minute, are you sure you know what voltage those modules were operating at in the thing you took them out of? Those modules are usually 3V or 5V, if you connected a 3V module to 4V-5V you're taking a chance with it, and as already said, reversing polarity will easily kill it.

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Old 06-23-2015, 11:16 AM #14
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Originally Posted by Pi R Squared View Post
Now wait a minute, are you sure you know what voltage those modules were operating at in the thing you took them out of? Those modules are usually 3V or 5V, if you connected a 3V module to 4V-5V you're taking a chance with it, and as already said, reversing polarity will easily kill it.

Alan
well its no more then 4.5v there's no way. It's got to be reverse polarity. Didn't know these things were so sensitive, you'd think they would have protection from something like that? I thought laser diodes are just like led. Light only goes when hooked up one way.

Last edited by AutisticArch; 06-23-2015 at 11:16 AM.
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