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532nm help..?

A

AutisticArch

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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..?
 





micheal rosen

micheal rosen

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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.
 
hwang21

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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
 
A

AutisticArch

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hwang21 said:
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
Click to expand...

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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marcuspeh

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AutisticArch said:
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..
Click to expand...

Did you put the polarity of the battery correctly?
 
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AutisticArch

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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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micheal rosen

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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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AutisticArch

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micheal rosen said:
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.
Click to expand...
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?
 
micheal rosen

micheal rosen

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AutisticArch said:
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..?
Click to expand...

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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AutisticArch

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micheal rosen said:
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.
Click to expand...
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.
 
Pi R Squared

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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
 
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AutisticArch

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Pi R Squared said:
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
Click to expand...
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.
:p
 
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