Arduino

youTube grbl

Makey Makey

Follow the links in the above link.
Using Arduino IDE to program Makey Makey
Instructions on the Instructables site above are a bit vague. However, they work : unzip in the Arduino folder and restart the IDE. My indication of vagueness results from other experience of imprecise directions in adding functionality to the IDE.

Arduino Nano pinout and clear explanation

arduino library - how to make and use

tip 1
tip 2
tip 3
all-about-arduino-libraries-install

<a href="https://create.arduino.cc/example/builtin/01.Basics%5CBlink/Blink/previe... cloud</a>