Keyestudio ESP32 - Project 8：Music Performer; 1. Description; 2. Working Principle; 3. Wiring Diagram

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ESP32 Starter Kit

9.2.11 Project 8Music Performer

1. Description

In this project, we will use a power ampliﬁer speaker to play music. This speaker can not only play simple songs, but

also perform what you desire. Thus, you can program other interesting codes in the project to accomplish splendid

learning outcomes.

2. Working Principle

The electrical signal is input from pin 1 of RP1 (adjusts signal intensity, which is also the sound volume). After coupling

in C4 and passing R5, the signal reaches IN- pin of 8002B, in which it is operationally ampliﬁed and output to BEE1

speaker.

202 Chapter 9. Scratch Tutorial