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Type: Posts; User: ColinHarrington

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  1. I've been looking at the waveforms generated by a...

    I've been looking at the waveforms generated by a few different libraries on an Oscilloscope and this is what I have found:...
  2. FYI, the latest OctoWS2811 included in...

    FYI, the latest OctoWS2811 included in teensyduino isn't the latest on github:

    This version was included with teensyduino 1.20-rc3...
  3. There aren't any other copies of OctoWS2811 in my...

    There aren't any other copies of OctoWS2811 in my ~/sketchbook/

    $ locate OctoWS2811.h
    /home/<username>/Downloads/OctoWS2811/OctoWS2811.h...
  4. OctoWS2811 Teensy 3.1 Flickers madly, Teensy 3.0 doesn't.

    It has been a long road dealing with flickering LEDS. The same exact setup flickers madly with a Teensy 3.1, but runs smoothly with the Teensy 3.0.

    I got my project to a good state and dealt with...
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    The tests that I have been running have used the...

    The tests that I have been running have used the stock PlasmaAnimation (https://github.com/PaulStoffregen/OctoWS2811/blob/master/examples/PlasmaAnimation/PlasmaAnimation.ino)

    Even when the...
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    Checkout my Oscilloscope, you can see the ghost...

    Checkout my Oscilloscope, you can see the ghost of several jitters up to ~ 120ns that is close to a 10% shift of the 1250ns (1.25us). Take a look: http://imgur.com/0yQxkVf you can see the waveform...
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    Whoops missed that. I'll patch that up and try...

    Whoops missed that. I'll patch that up and try again tonight. Thank you.
  8. I have uncovered a number of issues on my...

    I have uncovered a number of issues on my project. I added filter caps to my LED strips, I eliminated a couple ground loops, found a power supply that has Active PFC and am using one of Paul's...
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    I was able to get my hands on an older...

    I was able to get my hands on an older oscilloscope. I am clearly seeing jitter in the data line. The consistently reproducible for me with the stock Plasma Animation example. The flicker is the...
  10. Software for USB communication with Teesny 3+

    I have an OctoWS2811 project that I'm working on https://www.youtube.com/watch?v=2CL4wqNrfoU 1 Teensy 3, 8x 120px strips arranged vertically.

    The video display and movie2serial program works...
  11. Awesome news!! It looks like you've got a...

    Awesome news!!

    It looks like you've got a capacitor(probably the 0.1uf you've recommended in another thread) on the buffer chip's vcc and 8x 100 ohm impedance matching resistors.
    What is the...
  12. OctoWS2811 flicker when connected via USB

    I've got a project that I'm working on with the OctoWS2811 library.

    This is what I have so far:
    https://www.youtube.com/watch?v=2CL4wqNrfoU

    8x WS2812B strips of 120px.
    2x 26a power supplies...
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    Teensyduino libraries in git?

    Are the Libraries that come with teensyduino somewhere in a git repository? If not, can they be?

    I'm using the OctoWS2811 on a project and have some updates I have made to the movie2serial to add...
  14. Thanks for the tip :-) Putting the resistors...

    Thanks for the tip :-) Putting the resistors after the buffer chip makes sense to me now. With my setup I've tried 220, 440 and 470 ohms. 440 seems to be the best at this point until I can get my...
  15. I've actually picked up the buffer chip and am...

    I've actually picked up the buffer chip and am using it, also 220 ohm resistors.
    Here are some pictures of my board: https://plus.google.com/+ColinHarrington/posts/4bzKkb6FYjJ




    I've picked...
  16. Awesome, I was planning on doing this in the...

    Awesome, I was planning on doing this in the final mounting anyway!
  17. I played around with different values, I was able...

    I played around with different values, I was able to get a little less flicker, but I haven't eliminated it yet :-/ Oh and it was easy to get more flickering too.

    I'm guessing that configuring...
  18. I have a few WS2812B strips (Thank you Ray Wu!). ...

    I have a few WS2812B strips (Thank you Ray Wu!). The Simple Red, Green Blue code works fine, I'm getting some flickering running in high-speed mode (800khz) It is more prominent later in my chain,...
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