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Old 03-08-2009, 09:14 PM #1
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Default Tricolor "Twinkling or Swarming" Display

So let's face it - I was pretty bored today so I threw together a really simple down-and-dirty "Twinkling" laser that I figured I'd share... Pretty simple, I picked up a 3.5rpm motor with bracket at American Science and Surplus (sciplus.com) for like $8 or so, and simply cut a piece of diffraction grating to go over the cutout on the bracket and one to rotate with the motor, as well as another one at about a 20deg angle of rotation on the other side of the cutout - BAM - complete rotating/swarming/twinkling HELL as soon as I shine anything through it... Should fit nicely in a box, too (I'm going to hack into an old ADJ "groove wheel" to use as a host, i think).

I'm going to finish it early this week with an 803T and a LOC as soon as I can get a heatsink/bracket made up, but I figured the pics here would give someone else a good starting point to do their own on the cheap, using your existing lasers! (BTW, in the pic of my wall there's also a 6X shining through, to give an idea of the projection size thats a 50" plasma on the wall and the "projector" is exactly 10ft from the wall, so it really gives a nice "spread", too)

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Tricolor "Twinkling or Swarming" Display-twinkling_build_03.jpg  


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Old 07-10-2009, 02:07 PM #2
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Default Re: Tricolor "Twinkling or Swarming" Display

i think i might try this, looks good. are all the diffraction gratings you used the same?
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Old 07-10-2009, 03:17 PM #3
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Default Re: Tricolor "Twinkling or Swarming" Display

This one used (3) 13,500 XY gratings, 2 static and 1 rotating
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Been out of the "Laser Loop" for several years - WHY didn't anyone TELL me we now had Green and real BLUE diodes, especially measured in WATTS !?!?!?!

Starting over, still have my Kryton BDR Build at 401mW and one of the first Eghamus hosts with an O-like module that has faded from 151mW to about 45mW at TEM01 over the years, LOL - still have my LaserBee 1 though
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