电子琴的原理图，即PCB图等，还附带了单片机C51的程序，能够较好的实现电子琴功能-Electronic organ schematic diagram, PCB figure, etc., also comes with a microcontroller C51 program, can better realize the electronic organ function

基于AT89C51的一款电子琴的实现。里面有原理图和程序。-AT89C51-based implementation of a keyboard. There are schematics and procedures.