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Thread: how to build a teensy3 light painting staff

  1. #1
    Senior Member mortonkopf's Avatar
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    how to build a teensy3 light painting staff

    hi all, i thought that it might be nice to share how to build a light painting staff using a teensy 3, sd card, and octows2811 pixel strip. So i have started a new thread to extricate this from two other threads. This comes from discussions on this forum for grabbing bmp file data from an sd card and displaying it line by line on a single row of ws2811 leds. The rod uses a single strip of the 144leds/m strips that i had spare from a POV project that the ws2811 weren't best suited to. The code is derived from the POV from bmp file on sd code that in turn was derived from the tft code of ZTik.nl.

    happy to write it up as a whole project if anyone is interested.

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    the first image is a 4sec exposure using a bmp file generated from a photograph. The file is 147 x 300 pixels, the card is read using SDFat, and displayed using Octows2811 after sorting the bmp file data into pixel rows in a buffer, and then processing them into the correct 24bit info for ws2811. The second image uses a maths loop.

    hope you like it
    mortonkopf

  2. #2
    Senior Member mortonkopf's Avatar
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    the code for using Teensy 3.6 onboard SD for light painting is at this thread: https://forum.pjrc.com/threads/30020...uild-Tutorial/
    post # 224
    it describes using the onboard SD card slot of the T3.6 with s2811 led stip to display 24bit BMP image files at variable projection times
    Last edited by mortonkopf; 05-27-2017 at 06:33 PM.

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