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Laser tripwire water balloon prank

Laser tripwire water balloon prank

Even though it’s a bit late for April Fool’s jokes, [Ameres] wrote in to share a project guaranteed to catch your friends (or enemies) by surprise.

Via Hack a Day | Posted on 2011.04.22 at 05:23

Laser tracker replays competitive rock wall climbs

Laser tracker replays competitive rock wall climbs

Instructables user [PenfoldPlant] is a big fan of indoor rock climbing, and while watching others make difficult climbs, he has often wondered if he could follow the same route up the wall.

Via Hack a Day | Posted on 2011.04.19 at 20:31

Laser trip wire – the bare essentials

Laser trip wire – the bare essentials

[Gordon] sent us a tip about this simple laser trip wire system after reading yesterday’s post on a more complicated laser security unit. That build did a lot to provide functionality, such as a system to disarm the trip wire, and a robust light detection circuit.

Via Hack a Day | Posted on 2011.04.19 at 19:58

Laser tripwire alarm system uses mirrors to increase coverage

Laser tripwire alarm system uses mirrors to increase coverage

Instructables user [EngineeringShock] has been hard at work building a laser trip wire security system, complete with a combination lock. The security system works just like you see in the movies, employing an array of mirrors to bounce the laser across an opening several times in order to secure the space.

Via Hack a Day | Posted on 2011.04.19 at 06:28

Laser camera sees around corners

Laser camera sees around corners

After reading over the proceedings of the 2005 SIGGRAPH, [Dan] realized he could reproduce one of the projects with $50 worth of equipment and some extreme cleverness.

Via Hack a Day | Posted on 2011.04.19 at 06:14

Save boatloads of cash by building your own laser cutter

Save boatloads of cash by building your own laser cutter

Have a bunch of time on your hands, and about $2,500 sitting around? Why not settle in and build yourself a laser cutter? That’s exactly what Buildlog forum member [r691175002] did, and he told us about it in our comments just a few moments ago.

Via Hack a Day | Posted on 2011.04.15 at 01:15

Analog scope stands in to for laser light show

Analog scope stands in to for laser light show

[Joey] likes to dabble in laser projection, building his own hardware and writing the software that drives it. One way that he tests his setup is by replacing the laser assembly with an analog oscilloscope.

Via Hack a Day | Posted on 2011.04.14 at 12:25

Blu-ray laser plotter writes on glow-in-the-dark screen

Blu-ray laser plotter writes on glow-in-the-dark screen

This laser display is persistent thanks to a glow-in-the-dark screen. [Daniel] built it using a Blu-ray laser diode. As the laser dot traverses the screen, it charges the phosphors in the glow material, which stay charged long enough to show a full image.

Via Hack a Day | Posted on 2011.04.06 at 18:04

Laser light show features full XY control via homemade galvanometers

Laser light show features full XY control via homemade galvanometers

[Rich] over at NothingLabs has put together a really cool laser light show that you really must see in an effort to win a laser cutter from Instructables.

Via Hack a Day | Posted on 2011.03.17 at 06:02

DIY laser light show is sure to please

DIY laser light show is sure to please

[Pete] had some spare time on his hands over his spring break, and he was itching to build something. He settled on a laser light show since, after all it was spring break, and what says “Party” better than a laser light show? He glued three hobby mirrors to three small motors, mounting the motor assemblies on the lid of a wooden cigar box he bought for next to nothing.

Via Hack a Day | Posted on 2011.03.13 at 18:10


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