ESP32 Starter Kit
3. Stop playing module, we only need to set the corresponding pin to stop the music
9.2.12 Project 9Digital Tube Display
1. Description
This 4-Digit tube display is a device used to display counting or time, which is able to display numbers from 0 ~ 9 and
simple letters. It consists of four digital tubes, each of which has seven light-emitting diodes (LED).
Moreover, multiple functions can be realized by connecting their pins to the Arduino development board, such as
timekeeping and some game storing.
206 Chapter 9. Scratch Tutorial
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