Instructable provides instructions on how to make your own laser harp, but some commenters have questioned the wisdom of using a 3W laser close to the user’s face and hands.
The higher the laser power, the more dangerous it could be, especially if it catches reflection off a watch face or perhaps a sprinkler redirected into the user’s eyes, causing potential blindness.
Another danger is the stepper motor driving the rotating mirror that directs the laser beam to the various positions to simulate the harp strings: if it accidentally got switched on while the user had their hands in the wrong place, it could cause severe injury.
Some commenters recommended sticking to laser harp kits with safer specs, or even Theremins, as used by Hawkwind and 505 in live performances.
