Introduction - If you have any usage issues, please Google them yourself
AT89S52 Microcontroller based multi-scale keyboard design, simple operation, easy to implement. Can be used as reference for graduation, as a single chip design beginners.
AT89S52 Microcontroller based Design of multi-scale electronic keyboard\多音阶电子琴.DSN
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AT89S52 Microcontroller based Design of multi-scale electronic keyboard