Project Name: PCB Electronic Instrument

Project Author: Modified Workshop Director

Before we look at today’s open-source recommendation, let’s understand what a Stylophone is.

Stylophone is an electronic instrument. It was all the rage in the 1970s.

In fact, its creation was a coincidence; an enthusiast came up with the idea while repairing a toy keyboard for their child.

Not only did he restore the keyboard, but he also added a series of tone-modifying features, creating a new handheld electronic instrument with excellent sound quality and beautiful tones.

The Rolling Stones and rock pioneer David Bowie were both fond of it.

If you want to own a stylophone at a low cost, this article is worth a look!

Spend $12 to replicate a musical instrument worth over $40— the stylophone. This project mainly mimics its keyboard and operation method.

This project can modify the tone with a button, its sine wave tone is rich and deep, while the triangle wave tone is relatively bright…

The other two buttons can adjust high, medium, and low pitches.

Screenshot from the Modified Workshop Director’s Bilibili video

This is a very simple and very interesting project!

Made using the Hezhong ESP32C3, AD9833, LM4781, PCF8574T, speaker, and potentiometer.

Using SPI, I2C, IO input, it is very suitable for Arduino beginners.

The circuit principle is very simple: the Dupont wire connects to GND, and when the button detects it being held down by GND, it will cause I2C to scan the input status of the three PCF8574T pins. Detecting a low level will control the AD9833 to output a corresponding frequency waveform and output it to the speaker to produce music.

If you have other questions, you can also leave a message to the author at the bottom of the original project.

If you like it, give me a thumbs up!