Capacitive touch sensing demo
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Capacitive touch sensing allows to provide digital inputs with a simple touching of electrodes. In Arduino, the capacitiveSensor library can be used to convert two or more of its I/O pins into a capacitive sensor. This technique requires external resistors and metal foils to work properly. This Instructable describes a physical setup for making five capacitive touch sensors with the Arduino I/O pins.
Capacitive touch sensing with Arduino
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