"基于STC89C51单片机的简易电子琴设计方案详解及优势分析"

Abstract: With the continuous development of science and technology, the application of single-chip microcontrollers is becoming increasingly mature. The high integration, powerful processing capabilities, and low cost of single-chip microcontrollers make them widely used in various fields. At the same time, electronic keyboards, as products of the joint development of science and music, have made an irreplaceable contribution to the popularization of music in this electronic information age. This article mainly introduces a simple electronic keyboard design scheme based on the 51 single-chip microcontroller. It adopts a low-power, high-performance single-chip microcontroller STC89C52 chip produced by STC company as the main control unit, and combines it with a 4*4 matrix keyboard, reset circuit, LED dual digit display, speaker, and other components to form the main control core module. The article elaborates on the hardware design and software structure design process of the electronic keyboard, using Altium Designer 09 to draw schematic diagrams and PCB layouts, programming the keyboard with Keil programming software, and then debugging the hardware and software to burn the program into the STC89C52 chip. This system runs stably, with advantages of simple and clear hardware design circuit, low cost, complete software functions, reliable control system, and high cost performance, which has certain practical and reference value. Keywords: STC89C52; electronic keyboard; matrix keyboard.