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AT89单片机在KEIL环境下的电子琴设计，包含PROTEUS仿真电路图-AT89 microcontroller contains PROTEUS simulation circuit in KEIL environment flower design,

lcd1602在单片机keil，proteus中的仿真显示代码及显示电路。-lcd1602 in the SCM keil, proteus simulation shows the code and display circuit.