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Re: Neopixels & regulators
We ran 150 neopixels off the 2A VRM output without issue last year. It was a 5m strip 30 leds/meter. We never used all white full power, but otherwise took no special precautions. Grounding was not an issue. We grounded one end of the strip to the VRM and the other to the Roborio. For reference, the same programming would brown out the Roborio 5V supply.
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Ryan Shoff
4143 Mars/Wars
CheapGears.com
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