laser specs?
I got a couple lasers out of a dvd drive and I'm hoping to bring them to their max to light some matches for a project. Anyone know what what the max voltage they run on is? Thanks a lot.
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PG
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PG
Comments
if you just use a voltage regulator it is likely to work, but you won't have good control of its over,and it will likely burn out quickly.
And yes, be careful!
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My head is pasming!
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My head is pasming!
NOT!
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John R.
Click here to see my Nomad Build Log
Oh, and catfish have to be blind - how else could they mate?
parts.digikey.com/1/parts/569353-ic-laser-dvr-3ch-2-output-16ssop-t0806-tcqg.html
Both lasers seem the same, three pin, red output. The only difference is one had two pins bridged together. Think it would be alright to run it off of a 5v regulator? I'd hate to have to buy more stuff to make it work.
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PG
Someone else has correctly stated only one is the red laser the other IR and will be no good for what you want. Do a Google search with your DVD player somehting like DVD player using diode to burn matches you will not believe all the hits you will get
and then I would build one of the LM317 regulators for using these lasers at least the thing will live for a little while you might also want to try and use a heat sink again I did not and it worked but for a very short time
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PG
i think one could puzzle out how to get it turned on from there, but it might take some trying.
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My head is pasming!
The pinout is usually (viewed from back)
As others have pointed out, it is very important to drive the diode with current, and at the very least a current limiting resistor in series with the diode. These burner diodes will have a forward voltage of around 2.5 volts, so if you want to be minimalist and have only a 5 volt power supply, then start with a 100 ohm resistor in series between the power supply and the diode, to shoot for 30 mA. You can decrease that resistor value one step at a time down to say 10 ohms for around 250 mA. Above some current the laser will start up, and above another current, it will burn out. If you don't know more about the laser itself, you are left with guesswork. The laser driver integrated circuit is overkill for what you want to do, but the next step up from a series resistor is the LM317 current source that others here have linked to.
Be very very very careful where you have it pointed. That is doubly true for an infrared laser, because you can't see it and your natural aversion reflex will not kink in until it's too late.
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Tracy Allen
www.emesystems.com
www.laserfaq.org/sam/laserdps.htm#dpssld
works like a charm but for anything over a few mW you should Heat Sink the LM317.
I would also put a 7805 plus a SI Diode to drop .69V in front of the 317 to keep the LASER Diode happy with voltage ...
My DPSS diode runs at 4.3 Volts ..
I can feed the whole assembly with 7-24 V with no change in LASER output.
www.youtube.com/watch?v=J7tXJPkjLGE
Said Module being used at 40mW .
KG6LSE
Peter
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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL
Post Edited (Peter KG6LSE) : 1/16/2010 3:52:34 AM GMT
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PG
This is why your beam is so wide .
If you hack a cheap pointer then you can get on from there .
Also If you want to see where the beam goes use a Night vision device or a CCD Video cam .
BTW the 1 SEC threshold for a strick anywhere match from what I have found with a 808nM Diode is ~600mW , You can go lower but it will take longer for it to light ..
Peter KG6LSE
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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL
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Tracy Allen
www.emesystems.com
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PG
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PG
My Wally world 4$ one did this ....
Peter KG6LSE
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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL