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MicroPython NeoPixel Demoscene Plasma @micropython

 

Check out the latest Watch Tony D’s Desk video for a deep dive into recreating classic demoscene plasma effects with MicroPython ESP8266 and a grid of NeoPixels.  This was a fun little live coding video without a related guide yet, enjoy!

MicroPython & NeoPixel demoscene plasma with Tony D!


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2 Comments

  1. Tony,

    There appears to be a bug in Micropython v1.8.4 using NeoPixels module. I found this with the Feather Huzzah ESP8266 wIth the RGB FeatherWing (from my Adabox!).
    >>> np.fill((0,0,0))
    >>> np.write()
    Makes all the RGB LEDS dimly lit NOT all off.

    I discussed this with Damian George, the author of MicroPython, via a github bug report.

    SOLUTION: Raise the clock speed on the Feather from 80MHz (default) to 160MHz.
    >>> machine.freq(160000000)

    Likely this impacts power consumption but this cures this nasty np.fill((0,0,0)) = dim not off problem

    You might want to add that advice to your MIcropython / NeoPixel tutorials. If people are seeing glitches on the MicroPython NeoPixels, just throw in the machine.freq(160000000) and see if that fixes it. It could also be related to how the board is powered or only show up sometimes depending on power source, etc

    Richard

  2. Oh thanks for the tip! I’ll mention it in a guide once this gets written up later. If it helps I usually use a lipoly battery to power neopixels and the board so they have a good amount of current available. Great tip to bump up the clockspeed if you get issues with other power sources!

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