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/diy/ - Do It Yourself

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File: 1001 KB, 2560x1920, 2012-01-06 23.32.18.jpg [View same] [iqdb] [saucenao] [google]
116031 No.116031 [Reply] [Original]

Hey /diy/! Wanted to see what you guys thought of my latest creation.

Used a M140 diode. Power is roughly 1W, wavelength is 445 nm. Custom aluminum heatsink keeps the guts cool.

Also, lasers general? :-)

>> No.116058

Can it burn things?

>> No.116068

>>116058
>1W

I'm going to go ahead and assume yes.

>> No.116552

>>116058
Easy, dude. Cuts through electrical tape, lights matches, burns plastic, etc. No real practical purpose but it's cool as shit.

>> No.116555

Where'd you buy the diode?
How do you regulate current? Opamp with feedback, specific LED driver, or something else?

>> No.116558

>>116555
Got it from a guy who runs his own store. No idea where he gets them though. I used a flexdrive to set the current, which is great because of how tiny it is. Then with the power supply (5 volt 1.5 amp generic AC adapter) it all runs pretty smooth.

>> No.116560

>>116558
Well, cool. *laserfist*

>> No.116571
File: 23 KB, 640x480, SLA.png [View same] [iqdb] [saucenao] [google]
116571

>>116552
Combine that with a high speed galvonometer setup, vat of photopolymer, linear actuator and you've made a 3d printer.

pic related

>> No.116579

>>116571
Well shit, that's pretty awesome. How feasible would making that stuff from scratch/buying it be?
>>116560
Thanks, man! *laserfist*

>> No.116632

bump

>> No.116825

>>116031
I just found kipkay's tutorial for building a portable flashlight type laser and he suggests using a DVD burner for the diode. Any advice on which DVD burners actually have the type of diode I would need?

>> No.116836

>>116825
I've had some pretty good luck with LG DVD burners. Usually they'll yield an open can 650 nm diode which will probably put out around 250-300 mW.

Although, just a couple words of advice: it's in your best interest not to do anything kipkay says. His build doesn't use a driver of any kind and will fry your diode QUICK.

Also, google I think lasermod. It's a store I used a while back to order a couple red diodes. WAY cheaper than trying to harvest them yourself (although it's so satisfying to do).

That being said, good luck! And DEFINITELY invest in a pair of laser goggles. Anything above 5mW is going to damage your eyes before the blink reflex kicks in.

>> No.116840

Also, while I'm here: if anyone's actually looking to build a less powerful laser than the one pictured in my OP, grab this stuff:

A dead computer
A DVD burner (from what I've heard has to be over 16x, hopefully it comes with the dead pc)
An aixiz laser module (get it from modwerx dot com)
An lm317 regulator (radioshack or online for teh cheap)
And I believe a 3 ohm resistor

Annnd that should be it. Also: modwerx will have all the laser stuff you need, not lasermod (sorry about that)

>> No.116844

>>116579
>How feasible would making that stuff from scratch/buying it be?

An extruder working off a solid plastic cord with a melting nozzle is a lot easier(partially because there's 5 or so DIY models availible out there to look to for help).

If memory don't fail me the liquid photopolymers used are generally toxic too.

>> No.116847

>>116840
Some stuff you need to do: harvest the diode from the DVD burner (google a tutorial for it, you'll need a video as I can't do justice in describing it)... Or order one if you're patient.

Open up the PC and remove the PSU and the heatsinks.

For the PSU strip a black wire and the green wire and attach them (you're basically hotwiring the PSU by doing this). We'll use a yellow wire as a positive and a red wire as a negative - prep those by stripping them (but don't attach them, obviously).

>> No.116852

>>116847
If anyone's actually doing this and needs help doing this please let me know. The parts with the diode are the trickiest as it's incredibly sensitive and needs to be handled with care.

>> No.116855

>>116852
Sorry, posting got screwed up. That was in reference to this bit:

You're going to need to press the diode into the aixiz laser module. Or just order it like that if you're feeling lazy. Basically you line the diode up in the little hole and use the back of the module to press it in.

Be fucking careful doing this and don't mess with those god damn pins.

>> No.117324

How powerful could i make one of these if i want to say, be able to carry it around in case i get trapped in a weird situation and need to cut my way out of it? Can i make it discreet?

>> No.117330

>>116571
>1 W laser
>for a 3d printer
LOL, no. Thats just a fire.

>> No.117339

>>116571
>>116571
>>116571
Don't 3D printers work based on LiDAR?