We’re suckers for any type of job that’s well packaged, however an added benefit is when most of the elements can be sourced cheaply as well as locally. Such is the situation for this bit laser light show, housed in electrical boxes from the regional house center as well as developed with stuff you most likely have in your junk bin.
When we very first came across [replayreb]’s review as well as saw that he utilized difficult drives in its construction, we presumed he utilized head galvanometers to drive the mirrors. As it turns out, he utilized that approach in an earlier project, however this time around around, the difficult drive only contributed its platters for utilize as low mass, very first surface mirrors. as well as rather than driving the mirrors with galvos, he selected ordinary old cleaned DC motors. These have the considerable advantage of being inexpensive as well as a perfect in shape for 3/4″ EMT set-screw connectors, designed to link thin-wall conduit, also understood as electromechanical tubing, to electrical boxes as well as panels. The motors are mounted to the back as well as side of the box so their axes are 90° from each other, as well as the mirrors are constrained by little cable ties as well as set at 45°. The motors are driven directly by the left as well as right channels of a little audio amp, wiggling sufficient to produce a decent light show from the laser module.
We particularly like the truth that these boxes are inexpensive sufficient that you can develop three with different color lasers. in that case, an obvious next step would be bandpass filters to split the signal into bass, midrange, as well as treble for that retro-modern light organ effect. Or perhaps figuring out what audio signals you’d requirement to make this box into a laser sky screen would be a great concept too.