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Thread: Announcing ILDAC-32 - an ESP-32 based DAC for ILDA projectors

  1. #31
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    Buffo, if down the road he wants help with a six or eight (or more) point flat slope correction curve, the fit for each segment is Intensity out = M*Icommanded + B

    Aka Y = mX+B from good ole Algebra class. M will not always be an integer, but a fractional, probably a Float16 or a Float32 so that may eat up processing time.

    Slope and offset from each breakpoint location, now interpreting where you are on that line segment in software can't be that bad.

    I'll do my best. If I can remember what Sister Suzanne taught me in ninth grade. AT my age that might be tough as I never use it in the day job, anymore.

    Peter,

    QM32 uses a Dac chip to drive the Reference Pin of a Dac Chip and or Multiplying DAC Chip for scaling, color, etc. It is the most beautiful image size control I have ever seen. But expensive unless you can find a MDAC with a lot of consumer application. The reason for doing it that way is near zero loss of resolution in the image. Good XY needs a minimum of 10 bits for the eye in the near field while not controlling image size with the DAC. . Pangolin, back in the day, ran tests according to Pat Murphy.. Semiconductor prices for good parts are unreal right now.

    Steve
    Last edited by mixedgas; 02-08-2022 at 16:50.
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  2. #32
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    Quote Originally Posted by mixedgas View Post
    Any possibility of adding WAV to ILDA for XYRGBS where s = spare or timecode and optional.
    Steve
    Ask and ye shall receive.

    Over the last month or so, I've now hacked in a fourth 12-bit DAC to the three DACs already on the ILDAC (see pic below).

    I've also added code to play, with stereo audio, any 44.1kHz or 48kHz 16-bit WAV file content (scaled down to the 12-bit DACs). To answer any questions a head of time, the unit plays the XY/RGB/Left/Right WAV channels.

    Have some WAV files or an entire show you want to play? Put it on the SD card, and select the file to play, or "Play All" to play all the WAV files in any directory on the SD card. No other computer hardware of software necessary (other than any desktop or mobile web browser) It's that easy.

    So now the ILDAC-WAV can display all the standard test patterns, several test shapes and beams and a lumia cue. And thousands of ILDA files in the Photolexicon FTP collection. And now almost any WAV file show content.

    I'll be sending initial ILDAC-WAV prototype PCBs out to be made in the next few days. Once the new boards are built and tested, I'll be offering them for sale for $199 each (price subject to change based on current chip prices). Once the new ILDAC-WAV version is tested and available, I'll be selling the existing Ver-1 ILDAC-32 without WAV functionality for $100. I have five V1 units left.

    I have a demo video with a few clips of WAV files being played, but since it contains copyrighted content, please PM me if you would like to see it.

    -Hank

    Click image for larger version. 

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    Last edited by HankLloydRight; 04-01-2022 at 23:27.

  3. #33
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    Hi folks,
    I've been busy at work with ILDAC-32-WAV which is now complete!
    It's the same ILDAC-32 as above, but with an additional DAC for stereo audio output so it can now play 8-channel WAV files.

    Click image for larger version. 

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    I've spent a lot of time optimizing the code to smoothly play any 8 channel, 16-bit WAV file at any bitrate up to 48kHz.

    Below are two sample videos showing the ILDAC-32-WAV playing WAV content. Remember, ILDAC-32 and ILDAC-32-WAV units are entirely self-contained. No computer, software, or other DAC is used here. The WAV files are stored on an internal micro-SD card.

    The laser projector is an X-LASER Mobile Beat Mirage. Videos captured with an iPhone using the native camera app.

    This first video is a supercut of several clips of a live performance (with audio) on a Radiator by Swamidog. These were captured live with a WAVE-USB directly to 8-channel WAV files. I used Audacity to extract the best clips, and played them back on ILDAC-32-WAV.

    https://youtu.be/YUMdzEKSdvo

    This second video is Swamidog's LSX show "One of These Days" (used with permission) originally played in Beyond/FB3, captured with WAVE-USB to a WAV file, and then played back unedited on ILDAC-32-WAV:

    https://youtu.be/8m-9P-y30sc

    I've also updated my website for both ILDAC-32 (test patterns, beams and shapes and plays ILDA files), and ILDAC-32-WAV adds the ability to store and playback WAV files: https://ildac32.com

    I'll be making another post on PL and Facebook tomorrow specifically for ILDAC-32-WAV.
    Last edited by HankLloydRight; 05-29-2022 at 02:07.

  4. #34
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    Wait a minute. What? Please explain the relationship between ILDA vector graphics and WAV.

    I don't get it.

    James.
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    Quote Originally Posted by james View Post
    Wait a minute. What? Please explain the relationship between ILDA vector graphics and WAV.

    I don't get it.

    James.
    Is there such a thing as that???
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    Quote Originally Posted by james View Post
    Wait a minute. What? Please explain the relationship between ILDA vector graphics and WAV.
    I don't get it.
    James.
    There is no relationship. *see below

    This is a compact device that can play both ILDA files and WAV files on demand. Itís your choice.

    Like I mentioned above, this unit is entirely self contained. Just load up the files to the SD card which you want to project, then connect with either the built-in web server or the mobile app over Bluetooth to fully control the ILDAC-32 functions. See the multiple demo videos on my website.



    EDIT: the relationship is actually both ILDA files and WAV files are simply long lists of X/Y points and RGB colors, just in different formats.
    Last edited by HankLloydRight; 05-29-2022 at 02:20.

  7. #37
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    Just out of curiosity, are you familiar with LaserBoy and what it can do?
    Creator of LaserBoy!
    LaserBoy is free and runs in Windows, MacOS and Linux (including Raspberry Pi!).
    Download LaserBoy!
    YouTube Tutorials
    Ask me about my LaserBoy Correction Amp Kit for sale!
    Either do or do not do. There is no undo!

  8. #38
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    Quote Originally Posted by james View Post
    Just out of curiosity, are you familiar with LaserBoy and what it can do?
    what's laserboy?
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  9. #39
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    Quote Originally Posted by swamidog View Post
    what's laserboy?
    Exactly.
    ........
    Creator of LaserBoy!
    LaserBoy is free and runs in Windows, MacOS and Linux (including Raspberry Pi!).
    Download LaserBoy!
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  10. #40
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    Quote Originally Posted by james View Post
    Just out of curiosity, are you familiar with LaserBoy and what it can do?
    Sure I do, but what does a clip-on laser spirit level have to do with projecting WAV files as laser shows?

    https://www.bmi.de/en/products-laser...laserboy-2.php
    Click image for larger version. 

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    J/K!!

    Yes, I am very familiar with your Laserboy software, and that there's almost nothing it can't do. I think 50% of the posts on PL these days are people saying "how can I do X?" and you promptly responding "Laserboy can do that." I've even read your entire manifesto on ILDA formats back when I started this project last year and knew nothing about ILDA formats (or WAV for that matter).

    But I haven't had the need for Laserboy to do any conversions (yet).

    Also, from your website (which is down, BTW) to use Laserboy as a WAV player, one would need:
    -- A computer running Windows, MacOS, or Linux
    -- Laserboy software
    -- DC modified 8 channel sound card (modified how?)
    -- some outboard electronics (not sure what these are since your website is down right now)

    Whereas with ILDAC-32, all you need is the ILDAC-32 unit and a cell phone.

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