In principle, the circuit is very simple – the Arduino contains six switches made from copper wire. Each digital input is a pull-down resister giving a 0 input on D3-D8. When the plectrum/pick makes contact with the string/wire, this completes a circuit to pull the input to 1.
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Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: A New Arduino MicroPython Package Manager, How-Tos and Much More! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey