In this video I explain how you can use an Arduino to make music using just a speaker and a resistor.
Project tutorial by Code_and_Make
Did you run out of input pins? Don't worry, here is a solution without any shift registers.
Project tutorial by Najad
Made my own version of Arduboy, from breadboard to printed circuit board!
Project tutorial by Neeraj Rane
cool project ...
Certainly still expandable on a high color display ...
Simple but well documented!
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