This was actually a project gone wrong, so now it's just a toy/prop with interesting light effects. It's simply an enclosure to hold 3 laser pens with the ability to control all of them at once.
I already had most of the components on hand since I'm into electronic engineering, so for me the total cost was $3.00 for the laser pens. If you need to purchase everything listed then it should be around $10.00 to make this.
This project required some light soldering and cutting with a dremel cut-off tool. This is not a step by step tutorial with detailed instructions. It should be, for the most part, self explanatory. I am posting this with the assumption that you will have some knowledge and experience with electronics. If not, please do not take on this project.
X3 laser pointer pens (red, green, blue) http://ebay.to/2qArcZ1
X1 DPST slide switch http://ebay.to/2ri9dtk
X1 18650 4.2v L-Ion cell http://ebay.to/2qwru54
X3 tactile switches http://ebay.to/2qAfA8u
X1 18650 Lithium Ion charging board http://ebay.to/2rutlF3
Epoxy or hot glue gun, soldering iron, dremel cut-off wheel.
To me, this all seems pretty self explanatory. You're just putting the lasers inside the enclosure and using some hot glue to keep them in place. I made this because I hate using consumer type AA/AAA batteries and I wanted the lasers to be an "all in one" solution, using a rechargable 18650 instead of going through consumer batteries all the time.
I soldered a bridge to close the gates on the laser pointer tactile buttons and removed the actuators. Save those actuators if you're a maker! I'm sure you will have use for them in the future and actuators are sometimes difficult to acquire. My new switch gates are the tactile switches and slide switch mounted in the enclosure. The gates are now located on the connection from the battery to the lasers. See diagram below.
You can either drill some holes and use screws, or just seal the enclosure shut with epoxy (or acetone if using ABS) If you seal the enclosure, you will need the charging board to re-charge the battery. There is a square hole on the enclosure allowing for access to a charging port. The l-ion charging boards are pretty straight forward, see diagram below.
I'm not going to get too specific on wiring, because you can wire this any way you want to create different effects. I used some diodes for reverse voltage protection so I can control each laser individually or all at once with the slide switch.
See images below for documentation on how I did things.
depending on your settings, you may need support for the overhangs around the enclosure.
carefully cut the laser pointers with your dremel cut off wheel, to expose PCB driver and on board tactile switch. Solder a bridge to close gate because you will be powering on/off with new tactile switches and slide switch.
I took it a step further and completely removed the laser modules and drivers. I would not recommend doing it this way, as I broke a few before I was able to determine how sensitive the components are inside. It is way too easy to break them if you want to remove completely.
If both pieces of the enclosure are too big to print at once on your print bed, you can split objects into parts and print one at a time.
This is how I wired the lasers, the LED's represent the laser diodes and the lipo represents the 18650 cell. The charging board is not shown in this diagram, it is simply connected to battery POS & NEG.
This is optional. I used X2 8ohm resistors in series per diode for protection, but it's not mandatory as the laser diodes seem to be able to handle up to 5v DC except the blue/purple laser. The blue/purple laser is a bit more sensitive to voltage and can easily be blown.