Sparkfun Inventor's Kit for Learning Arduino - Digital Trumpet (Circuit 2B)

This Circuit expands on the Buzzers versatility by introducing Push-Buttons to control when notes are played. A Push-Button is a mechanical switch that allows for current to flow across its terminals when it's physically pressed in. Buttons aren't polarised however they are connected such that they require a resistor to stop a direct connection of power to GND. This resistor will be in the form of a pull-up resistor, a digitally programmed resistor that is connected to the output pin and +5V.

The full guide: https://core-electronics.com.au/tutorials/arduino-projects-with-sound-using-sparkfun-redboard.html


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