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  • Connect the grounds of both puck and neopixel. You don't need an isolator between, neopixels normally run with an input signal of 3.3V. Isolators tend to make a sine wave out of a rectangular wave pattern ;-)

  • @Spocki – Hmm, that's weird. I read elsewhere that they need a 5v supply and data line.

    @Gordon – ah, amazing! I'll update to 1v92 and see how I get on after that. Thanks!

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