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Old 10-31-2011, 05:21 PM #1
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Default Question about LPC-815 voltage

Hello so i ordered that laser and now i was thinking.
What voltage can give me 250 mW power and what voltage can give me safe 5mW power.
Since i dont have laser glasses yet i was thinking to make a mark on my potenciometer so i know where to move it to get safe voltage.

i got my multimeter for amperes and volts now i only need to know what voltage will give 5mw and 250 mw


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Old 10-31-2011, 05:54 PM #2
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Default Re: Question about LPC-815 voltage

Laser diodes need constant current, not constant voltage. Your driver will take care of that. You're going to have to use a test load to set your driver though.

Last edited by Ghostchrome; 10-31-2011 at 05:55 PM.
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Old 10-31-2011, 06:09 PM #3
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Default Re: Question about LPC-815 voltage

so does daedal circuit based on LM317 makes constant voltage or current?
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Old 10-31-2011, 06:11 PM #4
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Default Re: Question about LPC-815 voltage

daedal circuit is a constant current driver. It wil work fine.
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Old 10-31-2011, 06:19 PM #5
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Default Re: Question about LPC-815 voltage

Ok now i have 20 days till my laser arrives so all i need is to find laser glasses and build up soldering skillz.
BTW whats the cheapest red laser glases i could use with LPC-815
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Old 10-31-2011, 06:57 PM #6
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Default Re: Question about LPC-815 voltage

Yes, definitely get safety eyewear.

There's these:
Laser Glasses - Red laser beam protection 600-740nm :: Laser Safety :: Dragon Lasers

And these are a bit more expensive:
Eagle PairŪ 190-470nm & 660-760nm Laser Safety Goggles

Last edited by Ghostchrome; 10-31-2011 at 07:00 PM.
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Old 10-31-2011, 07:03 PM #7
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Default Re: Question about LPC-815 voltage

ooo thats expensive.
Atleast not as expensive as an new eye ball.
Lucky thing i got 15 pants that are not under 50 euros so i sell one and buy glasses and really good glass lens.
What glass lens you recommend for red laser on aixis laser housing?
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Old 10-31-2011, 07:28 PM #8
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Default Re: Question about LPC-815 voltage

The acrylic lens that comes with the Aixiz module is fine to start with. You could also use a glass lens that is coated for red lasers like this one.

AR coated glass lens for laser focusing modules(red/635-670nm) [M0006] - $6.49 : Modwerx Shop
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