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PIETROLS

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Dec 17, 2022
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So, i want to build a laser, I never built one before, and I don't have much knowledge in eletronics, I know a little bit tough, so I saw a video on youtube of a guy building a laser from a dvd reader, and I think that even though I am dumb I can make one, the thing I want to know is how do I know the voltage and amps needed for the laser? I saw the guy used a tension regulator, but how did he knew wich one to use? do they all have the same requirements?
 





Joined
Apr 23, 2011
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177
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You sound like you're about in my position when I first came here years ago.
While you certainly can go the path you're asking about, I'd highly recommend for a first build buying a diode and driver tuned to power it.
I tried more or less your approach when I joined and didn't work out too well. The project ended up going on hiatus until recently when I bought a new diode and driver w/power set for said diode and was able to finally complete my project.
I can whole heartedly recommend DTR's Laser Shop, can get the diode, driver, and module in a one stop shop and sent lickity split.
 

PIETROLS

New member
Joined
Dec 17, 2022
Messages
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Points
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yes, that is what i tought, i bought a diode online, it will arrive in 12january, it is ml101j29, but I don't know how I am going to turn it on, the datashet says what is writen in the image.
You sound like you're about in my position when I first came here years ago.
While you certainly can go the path you're asking about, I'd highly recommend for a first build buying a diode and driver tuned to power it.
I tried more or less your approach when I joined and didn't work out too well. The project ended up going on hiatus until recently when I bought a new diode and driver w/power set for said diode and was able to finally complete my project.
I can whole heartedly recommend DTR's Laser Shop, can get the diode, driver, and module in a one stop shop and sent lickity split.

i have a feeling I just need to feed 300mA at 2.6 volt without burning my house or the diode, if it is that easy, I think I can ask a eletrical store guy of what could meet this requirements, given that the closest thing to a safe power sorce i have is a modified computer power supply, but I am not sure if that is what I need to do. 20721293098_990364712.jpg
I bought this diode from a chinese store that will proabably smuggle it into my country without paying taxes for about 10dolar
 
Joined
Sep 20, 2013
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The Mitsubishi ML101J29 diodes are around 660 nm and are about the least expensive diodes around. I think I still have about half a dozen in my stock. As long as you heat sink it well you should have no problem driving it at 200 mA up to 300 mA with a constant current driver. The Vf is not that important as it will change with temperature. Good luck with your build.
 

PIETROLS

New member
Joined
Dec 17, 2022
Messages
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The Mitsubishi ML101J29 diodes are around 660 nm and are about the least expensive diodes around. I think I still have about half a dozen in my stock. As long as you heat sink it well you should have no problem driving it at 200 mA up to 300 mA with a constant current driver. The Vf is not that important as it will change with temperature. Good luck with your build.
thank you my friend, i will try to do that, and hopefullly, not die or blind myself, it does not seams too hard to do it, i think i can do a hetsink with some Processor heatsinks and some computer fans.
 
Joined
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thank you my friend, i will try to do that, and hopefullly, not die or blind myself, it does not seams too hard to do it, i think i can do a hetsink with some Processor heatsinks and some computer fans.

For that diode running at a current of 300 mA or less you likely won't need a huge heat sink or fan. It just won't get that hot.
 




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