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What Could You Do With 120 Laser Pointers?

Posted by Cliff on from the special-effects-anyone dept.

lazed-dazed asks: "I've recently come into possession of a large number (120 of 'em) of keychain laser pointers (minus the fancy diffraction adapters, though the specs are the same). So, Slashdot, I ask you: Can you give me any project ideas for these low-wattage bad boys? Holograms? Fancy cigarette lighters? Laser cannons? The crazier, the better! Oh, and don't bother suggesting cat toys."

4 of 266 comments (clear)

  1. Take out security cameras. by (H)elix1 · · Score: 5, Interesting

    Take out security cameras in a good chunk of downtown London....

    Laser pointers nicely mess up video camera... It probably won't hurt the camera, but here is a fun read if you have a bit of time on your hands.

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  2. Re:Point them to a single location... by cei · · Score: 5, Interesting

    Hell, attach mirrors to the speaker cone and point them at that from different angles. Play music through the speaker and instant light show!

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  3. to do with too many lazers by cgenman · · Score: 5, Interesting

    Attach about 30 of them to two gloves, and go dancing.

    Attach an AC adapter and mount a row of them above the front door, aiming down.

    Give them away at a local school. The teachers would love that.

    Drill holes into a thick wooden board, mounting the pointers upwards under a sheet of transparent plastic or glass. Sacrifice an audio LED controller or two to synchronize the beams to music. Learn to dance.

    Attach them all to a single trigger, and mount them together with a large amount of tape. Keep in your glovebox. When someone cuts you off, aim at their rear-view mirror.

    Build your own really inefficient 3D scanner.

    Can you say, Flash Mob?

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  4. Musical instrument by cybermace5 · · Score: 5, Interesting

    Put them all in a frame, each pointing at a phototransistor, and link to a frequency generator or microcontroller with MIDI output. Now you have a laser harp.

    In fact, here's a very informative website on the subject: The 250 laser harp project. Includes links to different projects, schematics, part sources, etc.

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