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Powering a small laser for several hours

ChrisJ

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Hello,

Apologies for the novice questions.

I have a small device attached to an Arduino board that can trigger my camera to fire when the laser trip is broken. I've tested this using a cheap laser pen (Keychain Laser Pointer | Maplin) to start out with but noticed that the battery life isn't very long when the laser is on continuously.

I'd like to have something that can last 5-7 hours. I understand you can't just buy a laser diode, hook it up to some batteries and away you go but trying to find out a way of creating a mobile, long-lasting device has proved difficult. Can anyone refer me to a decent resource for this kind of thing?

Thanks,

Chris
 
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Tmack

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Go to aixiz lasers. I bought some lab units that are 12v. And fan cooled. They can be plugged in with a simple wall adapter, or if portability is an issue a car battery can be directly wired to it and it will surely run for however long you like . The 180mw 638nm red 12v lab unit would be perfect.
 

Cyparagon

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Power your pointer with any of your junk phone chargers. Just cut off the plug, strip the leads, and solder in a ~33 ohm resistor in series to help limit the current.
 

Javalin

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I second the phone charger. Or one of those USB wall chargers. A car battery will put out 12V and some drill batteries go up to 19V. However now that I think about it, you could use a car battery with one of those 12V to USB / phone charger adapters to get the voltage down to a more manageable 5V. That would keep you from being tethered to a wall, but it wouldn't be terribly discreet either.
 

Tmack

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My aixiz lab lasers are 12v already and are fan cooled. They can also be adjusted from 5mw to 200mw. They have 405. 445. And 638 nm
 

Cyparagon

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55Wh... and it's not even rechargeable? You can get the same capacity in the same size with lithium for less than a tenth the cost. The only thing that would make this sell is that huge pile of buzz words.

"Fuel flexible solution that can run on a number of high energy fuels" That is only available from them, and at obscene cost, no doubt :tired:
 

123splat

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Aw Cy! Come on now,,, It worked for NASA, and look how they're doing..... Build it Faster, Better, Cheaper, ,,,,(pick two)
 

Cyparagon

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I don't think "photo studio" has the same design constraints of "Another f:)ckin planet" :p
 

KRNAZNBOY

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Yep, splice an old phone charger (5v) and buy a 5 piece bag of red laser modules from fasttech. Then plug it into the wall and you are good to go!

:beer:
-Matt
 




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