• A QT Py Christmas - add Sound

    For the final element of my QT Py Christmas ornament, I'd like to add the ability to play some Christmas music. The SAMD21 has a single DAC output that I'll use to generate tones, but I'll also need to add an audio amplifier to drive a speaker and figure…

  • A QT Py Christmas - add Cap Sense Buttons

    The SAMD21 processor that is used on the QT Py has a built in Peripheral Touch Controller (PTC) that can detect touch on external capacitive sensors. The PTC has a mutual-capacitance mode to sense touch on an x-y matrix and a self-capacitance mode to…