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Old 12-16-2012, 06:35 PM #1
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Default Driver operating voltages

Hello!
I'm very new with lasers so please help out

For my first "project", I decided to buy a green laser module (this)
and replace the existing module with it. Then I noticed that the existing module runs on a 16340 3.7v battery.
The module I ordered claims to run at 3.0v.
Will the laser be O.K operating at 3.7?


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Old 12-16-2012, 08:16 PM #2
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Default Re: Driver operating voltages

It depends on the driver. We can't say it will work 100%.
Some drivers work fine with either 3 or 3.7Volt and others will blow up at 3.7V
The specs says 3.0V and I woun't go beyond that.
There are 16340 cells that have 3.0V. They have a protective pcb that regulate the voltage. Maybe you should buy these cells.
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Old 12-16-2012, 11:36 PM #3
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Default Re: Driver operating voltages

Thanks for the reply .
Does anyone know how to test it....without blowing the driver or diode?
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Old 12-17-2012, 12:27 AM #4
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Default Re: Driver operating voltages

Maybe if you post some info about the driver (wich IC it uses, photos, a webpage) someone will be able to determine that.
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Old 12-17-2012, 01:46 AM #5
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Default Re: Driver operating voltages

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Originally Posted by luccax View Post
Maybe if you post some info about the driver (wich IC it uses, photos, a webpage) someone will be able to determine that.
Ummm...actually, it's included in my first post...
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Old 12-17-2012, 02:11 AM #6
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Default Re: Driver operating voltages

Ah...I contacted the seller and he/she said that 3.0 v only...Thanks for the help anyways!
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Old 12-17-2012, 06:39 PM #7
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Default Re: Driver operating voltages

Yes, sorry. I have one of those, don't go over 3V, heats up veeeeery quickly
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Last edited by luccax; 12-17-2012 at 06:40 PM.
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Old 12-18-2012, 12:48 AM #8
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Default Re: Driver operating voltages

Thanks!
I guess I'll keep it at a 3v or maybe 2.6v...
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Old 12-18-2012, 03:32 PM #9
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Default Re: Driver operating voltages

why not 3V? You might not get full power at 2,6
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Old 12-18-2012, 11:37 PM #10
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Default Re: Driver operating voltages

You're right..I should increase it..
I am going to use a 3.9V battery and a diode to reduce it to 3.2V.
Would that be okay?
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Old 12-24-2012, 03:47 AM #11
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Default Re: Driver operating voltages

Quote:
Originally Posted by luccax View Post
why not 3V? You might not get full power at 2,6
The diode is something like 1.9V, remember, and they use a very low dropout regulator. I've got a green pen that stays in regulation down to 2.3V.

Many people seem to forget that a cell's voltage is not absolute. Alkalines start at 1.6V and are empty at ~0.8V. NiMH starts at 1.4V and is empty at ~1.1V. Li-Ion starts at 4.2V and is empty at ~2.8V.

Unless your driver can accept all the voltages of the cell's charge state, you're wasting a lot of capacity.
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