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Pocket laser engraver.

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Step 3: Putting a laser together.

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There are so many good instructables on this subject, I will just make this part a quick one and let the pictures do most of the talking.

Removing the laser from the DVDR is not hard but most lens assemblies look different. Locate the diodes (there will be two, one IR and one red) and remove them from the assembly. There are some optics and two magnets that can be saved for future projects. Once you have removed the two diodes you must be careful. The two diodes are very small and fragile. Remove the small connecting PCB strips from the diodes and use two AAA batteries to check for the red diode.

Now that you have the bare diode it is time to mount the diode in the housing. Place the diode in the housing and use the back of the housing to press down the diode very carefully using a vice. When you get this far you are on the home stretch. Solder the wires to the positive and negative pins, screw in the lens and you are done.
 
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absolute zero8 months ago
Why do you need to buy a housing for the laser? It's already encased inside the cd drive. Why remove it and place it in a different one?
absolute zero8 months ago
Why do you need to buy a housing for the laser? It's already encased inside the cd drive. Why remove it and place it in a different one?
imont2 years ago
HI, I have a laser driver that needs more power than 5v from the arduino, so, i understand that i need to connect the power supply to the relay instead the relay connected to the 5v from arduino, is this correct? Or what i have to do? please help me!!!!
diaaeldin2 years ago
The fourteenth picture shows how to connect the positive and negative terminal
Shantorama3 years ago
Groover,

I have a couple of laser diodes i had bought for another project that never got used. I was wondering if you think they would be good for this application?

Here are the specs

Class III-B LASER
WAVELENGTH: 650-660nm
Max POWER: 500mw

It also says it needs a Clean 3 to 4 volts.

Thanks in advance
lperkins3 years ago
So, will the lens that's in the drive fit in the laser housing you've recommended and/or focus things properly? Or do I need to get one of those as well?
liodel3 years ago
Hi,
wonderful instructables, thank's for sharing.
I just wonder why do you need the red laser ?
I don't really understand what you're doing with after ?
The whole discussion about energies is cool and informative.

But from the technical aspect, which is better for this application, the shorter(RED) or longer(IR) wavelength?

The best comparison I can find is the Epilog Laser which use a IR laser.
noorelahi13 years ago
how can we kno , where to attach the possitive terminal nd the negative terminal on the diode..
and doesnt the laser diode need some type of a circuit to work ...
Groover (author)  noorelahi13 years ago
The fourteenth picture shows how to connect the positive and negative terminal. It will need a constant current driver to work. This can be done quite simple by a LM317 and some resistors as shown by the schematic in the "Electronics" step.
noorelahi13 years ago
how can i know about where to attach the posative terminal nd the negative terminal on the diode
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