This chapter covers
Expanding the Arduino’s input/outputs
Making a Spoon-o-Phone
MIDI air drums
Light show controlled by MIDI
Up to now, the chapters have looked at the MIDI message, including how to get it into and out of your Arduino and how to mess about with it to make effects like delays, automatic chords, and echoes. In this chapter, you will see how to generate MIDI messages from switches and sensors to make instruments and controllers. I will explain techniques you can use to interface even more stuff into the limited number of pins an Arduino Uno has, and also how to use some ...