Quote:
Originally Posted by AndyB871
That being said, I'm concerned about total current draw and where to source that current. The large neopixel strips can draw upwards of 4 amps. The VRM can only source 2A, Plus the neopixels are finicky about having a common ground between the data signal and power supply.
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We had two strips of 59 neopixels (long story) on our robot last year. We powered them off of the old radio 5V convertor without any troubles. We were also concerned about the shared ground but didn't experience any problems without connecting the grounds. The Arduino was powered off the USB port on the RoboRIO which lets us also send serial signals over USB.