Project 9: Passive Buzzer - Keyestudio ARDUINO maker learning kit Manual

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Project 9: Passive buzzer

Introduction
We can use Arduino to make many interactive works of which the most commonly used is
acoustic-optic display. All the previous experiment has something to do with LED. However, the
circuit in this experiment can produce sound. Normally, the experiment is 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
quite fun and simple.
Hardware required
Passive buzzer*1
Key *1
Breadboard*1
Breadboard jumper wires
Circuit connection
Connection for R3:
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