PCB electronic musical instrument

An instrument that imitates a stylophone, only mimicking the keyboard and the way it operates, without the essence of electronic sound.

It's very simple, entertaining,

Hezhou ESP32C3, AD9833, LM4781, PCF8574T, horn, potentiometer.

The principle is very simple, I2C scans the three PCF8574T of pin input states, detects a low level and controls the AD9833 output waveform corresponding to the frequency.

A very simple but very interesting project that uses SPI, I2C, and IO inputs at the same time, making it perfect for getting started with arduinio.

The code is then attached (Music BOX.zip）

Video Address:

https://www.bilibili.com/video/BV1Z84y1n7q9/?vd_source=922712da2bcef8666165702c88f19f89