With the back cover off you notice the first interesting element of this projector’s design: the external heatsink. Presumably it was cheaper and easier to tack a beam combiner into the design than get new cases injection molded.įour screws on the back of the unit allow you to pull off the cover, which I was somewhat impressed to see had a decent rubber seal around the edge to keep water out. Interestingly, there are only two laser apertures in the front of the unit, which means there must be some kind of beam combiner inside that’s allowing two of the lasers to shoot through one window. Usually these projectors are just packing red (662 nm) and green (532 nm), but this one has a blue (440 nm) laser as well. This particular projector isn’t much different from other’s I’ve seen, except for the fact that it actually has three lasers inside. This was a 75% price reduction from normal MSRP, and right in that sweet impulse-buy price range. Given how popular they are, I was surprised to see a lone Home Accents Holiday Multi-Color Light Projector on the clearance rack at Home Depot for around $14 a few days after Christmas. No need to get on a ladder and string lights on the roof when you can just blast some directed energy up there instead. Just set the projector up in front of your house, and you’re done. Laser projectors have been one of the most popular Christmas decorations for the last couple of years, and it’s not hard to see why. That’s right, you’ve seen them all over the neighborhood, probably took a few stray beams to the eye, you might even own your own. But Christmas lights and decorations have really started pushing the envelope in terms of technology: addressable RGB LED strands, Bluetooth controlled effects, and as of the last couple years, friggin’ lasers. Not that long ago, this would hardly be exciting news for the readers of Hackaday. It’s in this narrow corridor of time, between the Great Holiday Unloading and the new spring products coming in, that you can find some fantastic deals on Christmas decorations. No more money to be made on the most commercialized of all holidays, so back to business as usual. ![]() The Christmas music playing on the overhead speakers switches back to the family friendly Top 40, the store’s decorations get tossed in the compactor, and everything that’s even remotely related to the holiday is put on steep clearance. Those with you may actually be in MORE danger because they will be looking toward the direction of the action while you will know what to expect and avoid.In the world of big-box retail, December 26th is a very special day. Instruct anyone else with you as to the hazards of laser light and make sure they understand all of these guidelines.Put appropriate laser safety and electrical safety warning/danger stickers near the laser emission aperture and other beam path locations, on the laser, and on power supply components.Provide a 'kill' switch in an accessible location away from the laser.Follow all relevant electrical safety precautions.Clearly mark the path of the beam and provide barriers to prevent accidental contact with eyes (all lasers) and other body parts (high power lasers). ![]()
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