So I’ve always put small 100nF caps on AVCC and AREF when I need to do analog to digital conversions on my atmel chips. Everything worked, but I just got an LCD working and I’m getting a ~15% error between what my meter and the A2D are claiming the voltage is. If I remove the cap on either AVCC or A…

AVR Anolog to Digital Conversion Errors

Ross_Robotics November 7, 2014, 6:29pm 2

Yes, it is standard to put a 100nF cap in series with AREF.

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