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Originally Posted by Scooter
-Make absolutely sure that you filter the analog vcc line on your microcontroller (an inductor up to power and a cap down to ground), as it needs an extremely accurate 2.5v to take a comparison reading from, and if the line is noisy, it'll throw off your readings.
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I suspect the circuit inside the robot controller that supplies the analog output Vcc pins and ADC reference pins is already well-filtered and supplied from a stable internal voltage reference. Failing to do this within the robot controller would be a tremendous oversight on IFI's part.