Gizmodo
If you liked that backpack laser we showed you the other day, here's a much smaller laser that you can build yourself using an old DVD burner and a MiniMag flashlight. It's not going to be anything lethal, but it can actually cause a bit of damage, lighting a match or even popping a balloon with its ray gun-like beam. If you're slightly mechanically minded, you just might be able to put this one together. Be careful, though, you could put an eye out with this thing. In case you missed it, see the awesome video on the next page.
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DIY Laser Weapon
Make Your Own Laser Flashlight
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