My pressure sensor signal voltage to the arduino A0 pin is 75mV, or .015 of the 0-5V it puts out. The SAMD21 is 12 bit, so 4096 steps. .015*4095 = 61.4, but the reading is 26 or so. What am I missing?? Thanks! Bill

Sparkfun SAMD21 dev breakout issue

wpmjr May 7, 2025, 6:27pm 2

Here is the code and output.

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