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Thread: 200mW projector build

  1. #11
    Join Date
    Feb 2007
    Location
    Fort Mill, SC USA
    Posts
    1,418

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    Quote Originally Posted by janelo View Post
    Absolutely, the 20K scanners are not great, especially for graphics (and I really like graphics). I was actually thinking about buying a new set of DT50s for this project but ended up just using what I had. Unfortunately swapping the scanners is not that easy at this point. I think the best way around this will be to just build another projector . I had lots of fun on this project so I'm definitely planning on building myself a 2nd projector when I find the time for it.
    I do a lot of custom building with a focus on compact builds and high performing graphics. The Compact-506s with MachDSP amps and their 3.2A per channel PSU have the smallest footprint you can get for 40Kpps graphics. The 506's cost much more than what you put in there, but the ability to scan really wide and accurately at 40Kpps is very rewarding. In that build, you'd have to do some rearrangement of the components, but you obviously have a good eye for laying things out. That said, making a new build and relegating your current build to beam work in a small space is another option. You can't have too many lasers!

    Happy building/upgrading!

    -David
    "Help, help, I'm being repressed!"

  2. #12
    Join Date
    May 2015
    Posts
    3

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    I wasn't planning on putting the 405nm in a projector. I'm just curious how it looks in person. - Building a little module around a low powered 405nm diode would also definitely make for a fun evening.

    The 506s definitely look great - I'm sure they're well worth their money - but they still cost a fair penny.
    Should I decide to get a new set of galvos I'll definitely build another projector. Even in my current setup the rest of the system probably cost less than the scanners (using lots of diy parts really reduced cost).
    With that in mind I couldn't resist doing another build . There are also a few edges I'm not entirely happy with in this project.

    Jan

  3. #13
    Join Date
    Aug 2013
    Posts
    43

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    That's an awesome build!

    405nm is kind of disappointing in my opinion, except for glow-in-the-dark. Human M and L cone cells have a long tail in their response curves out towards 400nm, plus the S cone response is low to begin with in that part of the spectrum, so on its own 405 looks a bit pastel rather than the deep blue you might expect, and it's just plain dim because the total luminosity is low. It also does very little to expand the available gamut of a more conventional RGB projector for the same reasons.

  4. #14
    Join Date
    Feb 2007
    Location
    Fort Mill, SC USA
    Posts
    1,418

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    ^^^ What aberry said ^^^

    but . . add high quality glow in the dark paint and . .

    "Help, help, I'm being repressed!"

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