Make a guitar or keyboard from cardboard and foil. Connect tin foil pads to pin 0, 1, 2 and GND input pins on the micro:bit. When you touch the GND pin and one of the other pins, the program plays the note F, A or C in a guitar sound on your computer’s audio output. If you press them all together it plays the 3 notes at the same time. This is an F major chord. Pressing button A or B on the micro:bit causes the program to shift the pitch up or down an octave (a pitch shift of +120 or -120 is up or down one whole octave – 8 notes).
