See How Every Pin on an XIAO RP2040 Can Be a Capacitive Touch Sensor(hackster.io)
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See How Every Pin on an XIAO RP2040 Can Be a Capacitive Touch Sensor
https://www.hackster.io/news/see-how-every-pin-on-an-rp2040-can-be-a-capacitive-touch-sensor-309253054e34
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