Old 06-25-2011, 12:43 PM #33
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Default Re: Tetris + Laser Harp

Just some mucking around + learnt some more tetris notes. Also the first time I've used the harp in fog.



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Old 06-25-2011, 01:01 PM #34
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Default Re: Tetris + Laser Harp

That is very cool!
This is a great way to combine my love for music and lasers!!

Question though, can you play two notes at once?
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Old 06-25-2011, 01:13 PM #35
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Default Re: Tetris + Laser Harp

Yup Maybe even more, but it gets a bit difficult to distinguish notes with too many at once.
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Old 06-25-2011, 01:26 PM #36
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Default Re: Tetris + Laser Harp

^ THIS was the reason for which i suggested you to use red and green ..... so you can use, as example, green for tones and red for semitones, and have them disposed as in a keyboard (as example, keeping the 2 modules separated, so the beams comes out in two "fans" of beams, without need combining optics), and you have visual identification on-the-fly, about where the octaves are

BTW, if the board have difficult in reading the 2 "fans", you can use a dirty trick ..... two light sensors groups, one with a green filter (read only the green beams, for tones), and one with a red filter (read only the red beams, for semitones), also with two separated sound boards, just synchronized ..... you can call it a "super-professional laser harp", then )
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Old 06-25-2011, 01:33 PM #37
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Default Re: Tetris + Laser Harp

What I meant by hard to distinguish, is the notes are pretty close to each other in sound, so it's a bit hard to tell 1 note from another, by ear.

But multi colour would be cool, I might even add another laser output to the PCB I'm making

I have a feeler for a laser harp kit going in the GB section if anyone is interested.

Cheers,
Dan
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Old 06-25-2011, 01:57 PM #38
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Default Re: Tetris + Laser Harp

I posted interest...

I think the two color idea is great as well. As I was watching the video, I pictured a piano keyboard setup with the white keys as green and black keys as perhaps red.

Do you have a few links for building these? I'v seen a few good tutorials but lost the links.
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Old 06-25-2011, 02:44 PM #39
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Wink Re: Tetris + Laser Harp

^ there are some different ways for do that, the 2 more easy ones that came in mind are these ones:

different "fans" in this way:



but this can cause some problems, cause for the different inclinations, you have to displace your hands more, passing a semitone, and can "hit" involuntarily a beam different than the one you want.

Or, as alternative, combining the beams with a dichro, that gives you more different possibilities:



Green and yellow, red and green, or red and yellow beams, depending how you decide to drive the beams for the 2 combinations tones/semitones ..... other than this, all the beams remain on the same plane.

There is also a possible "cheap" way for change volume (or intensity, or flanging, or modulation, or whatever function you want to give it), using 2 or 3 light sensors with a linear diaphragm for have an indication (not precise, but still enough) of the distance of the hand, using this distance as supplementar control parameter, if you want to be a "bad boy" (no offenses, just a common word joke here )

It's all matter of how much work and programming you want to put in it ..... but, for sure, you can end with a machine that none of the commercial builders sells, actually
Attached Thumbnails
Tetris + Laser Harp-laserharpbeams01.jpg   Tetris + Laser Harp-laserharpbeams02.jpg  
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Old 06-25-2011, 04:11 PM #40
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Default Re: Tetris + Laser Harp

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