aytwartoofyoroo

PCB electronic musical instrument

Overview

It is a copycat of a stylistic instrument. It only imitates the keyboard and operation methods, but does not have the essence of electronic sound.

Very simple, just for fun,
use ESP32C3, AD9833, LM4781, PCF8574T, speakers, and potentiometers.
The principle is very simple. I2C scans the input status of the three PCF8574T pins and controls the AD9833 to output a waveform corresponding to the frequency when a low level is detected.
A very simple but very interesting project that uses SPI, I2C and IO input at the same time and is very suitable for beginners getting started with Arduinio.
The code is in the attachment (Music BOX.zip)
video address:
https://www.bilibili.com/video/BV1Z84y1n7q9/?vd_source=922712da2bcef8666165702c88f19f89

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-05-07 14:52:26

COVID-19 and other challenges to LED design and coping strategies
The COVID-19 pandemic, which has prompted the need for social distancing and staggered work hours, has forced us to rethink the use and lighting of office, manufacturing, retail and hospitality spaces
Application of CATIA V5 in strength design of automobile parts 1
CATIA is a CAD/CAM software developed by Dassault Aviation of France. It is sold in China by IBM. CATIA software enjoys a high reputation in the design fields of aircraft, automobiles, ships, etc. for
Showing the process of WEBENCH design + AC-DC power supply
1、2、3、4、5、
44b0 board FLASH problem
After the FLASH is soldered, I can't find the flash using the software Banyan Daemon and FlashAccess-V0.4.6. There is no cold soldering. I checked the pins one by one. The details are as follows: JTAG
The s3c2410 board cannot connect to the HyperTerminal on the PC, why?
[size=6]I use a serial cable to connect the s3c2410 board to a computer. Why is the HyperTerminal on the computer not responding? [/size] [size=6]Shouldn't I be able to enter the system in the board?
About Low Input Impedance, Low Noise Preamplifier Design
In order to receive the dual-channel signal from the coupling transformer, due to the low source impedance (100 ohms), the signal frequency is an audio signal. In order to achieve low-noise reception,

Datasheet More

Circuits More