Bart Massey 2023 (version 0.2.0)
This code demos capacitive touch sensing for the gold robot "logo pad" and other designated "touch pads" on the MicroBit v2. It works by driving the pad low for 5ms to drain any on-board capacitance, then measuring the time for the pad to charge through the 10MΩ resistor on the board until it reads high. On my board, it takes less than 50µs to charge with no finger, about 2.5ms to charge with a finger firmly planted.
This is currently a lib crate with some examples.
This work is licensed under the "MIT License". Please see the file
LICENSE.txt in this distribution for license terms.