Keyestudio ARDUINO maker learning kit, Manual

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Project 8: Active buzzer
Introduction
Arduino enables us to make many interesting interactive projects, many of which we have done
consists of a LED. They are light-related. While this time, the circuit will produce sound. The
sound experiment is usually done with a buzzer or a speaker, while buzzer is simpler and easier to
use. The buzzer we introduced here is a passive buzzer. It cannot be actuated by itself, but by
external pulse frequencies. Different frequencies produce different sounds. We can use Arduino to
code the melody of a song, which is actually fun and simple.
Hardware required
Buzzer*1
Key *1
Breadboard*1
Breadboard jumper wires
Circuit connection
Connection for R3: