Source: Make: DIY Projects and Ideas for Makers
The laser maze is the ultimate movie-themed security system, which protects valuable artifacts with a web of laser beams that would-be-thieves must stealthily duck, weave, crawl, and jump through without touching any beams and setting off the alarm. In real life, laser mazes don’t make the best home security systems, but they are a lot of fun to build, and even more fun to play with.
CAUTION: Laser light is intense and can damage your eyes. Remove highly reflective surfaces such as mirrors that may redirect laser light into someone’s eyes unexpectedly. Be sure to only use laser powers of 5mW or less to reduce the chance of eye damage in case of accidental eye exposure.
THE BASIC LASER MAZE
Building a basic laser maze is fairly simple: You’ll only need PVC pipe and connectors, “constant on switch” laser pointers, modeling clay, and a fog machine. Cut the PVC pipe into groups of equal length anywhere between about 2–3½ feet and connect them to form a large cage-like structure (Figure ) that you can walk through (6½ feet high, 5 feet wide, and 10 feet long is a good start). Mount the laser pointers on the sides of the PVC pipe structure with modeling clay, direct them into the center space at different angles, and turn them on. Finally, turn the lights off and pulse on the fog machine to make the laser beams appear bright…
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