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Replying to @kevinneubauer and @oshpark

Short and sweet: this one file that @Dan_Halbert pointed me to from CircuitPython’s touchio library. Describes a really effective method for touch sensing using just one digital pin and a 1MΩ resistor. One of these boards is to see how far I can take it :) https://github.com/adafruit/circuitpython/blob/master/shared-module/touchio/TouchIn.c

(original)