Project Outline: LaserScope Music

RE: Project Outline: LaserScope Music

dubbie — Thu, 13 Feb 2020 10:41:14 GMT

I tried something like this once, using a big speaker. Didn't get anywhere with it though (story of my project life I think!). Couldn't get the mechanical bits right.

Dubbie

RE: Project Outline: LaserScope Music

Former Member — Sat, 06 Feb 2016 08:27:09 GMT

You didn't accidentely stumble about this ? ->

https://blog.georgmill.de/2015/10/09/laser-illumination-for-the-graped-piano/

RE: Project Outline: LaserScope Music

rsc — Fri, 22 Jan 2016 20:20:42 GMT

I built one in 2007 for the Austin TX makerfare that projected specific patterns from MIDI note values, used a PIC and a DAC with a couple of galvos and a green laser (60mw). It was a fun project, but I found that the galvos were a bit slow and the size of the mirrors is a critical component due to inertia. There are some inexpensive galvos available now that go into the khz. $80 for the whole system on ebay:

Budget Laser Scanner Galvo Set ILDA Closed Loop 12 KPPS | eBay

Scott

RE: Project Outline: LaserScope Music

jc2048 — Fri, 15 Jan 2016 11:43:26 GMT

Unlike a speaker, which is biased to the centre position and where your ac to the coil drives the cone forward and backwards in a balanced way, won't the disk drive voice coil be biased to the rest position, with the head away from the platter, for safety?

If so, you'll need to bias it [electrically bias, I mean, I assume you won't want to do too much re-engineering of the mechanism] to the centre postion in order to use your audio amplifier. I'm sure that could be made to work ok, but an alternative you might want to consider would be to keep it unidirectional and have your audio signal control a current source driving the coil.

RE: Project Outline: LaserScope Music

DAB — Thu, 14 Jan 2016 19:42:44 GMT

Yes, lasers can be a lot of fun, but I urge everyone to wear safety glasses when working with them.

After all, the laser light is not the LAST thing you ever want to see.

DAB