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This is the music box application at89s51 microcontroller theory and control theory to design the hardware circuit

This article is AT89S51 single chip microcomputer principle and application of control theory to design a music box hardware circuit

This article is designs the musical box using at89S51 monolithic integrated circuit principle and the control theory the hardware electric circuit

This is the application 89 AT S 51 single-chip machine Operation and control theory to design the hardware circuit Music Box

This article is AT89S51 single chip microcomputer principle and application of control theory to design a music box hardware circuit