Design of Electronic Organ Based on MCU
Abstract: The design is an eight scales electronic organ based on MCU(Median Control Unit), which is mainly controlled by the microcontroller AT89C51. When the power switch is opened, pressing different keys can issue the corresponding notes. The peripheral circuit is composed of a power supply module, keyboard module, LED display module, voice module. Software control the internal timer T0 of MCU to produce different frequency square waves, square wave signal drives the buzzer to sound different notes sound. The system runs stably, the software is controlled easily, the hardware circuit is simple, the design is cost-effective.
Key Words : AT89C51 ; Matrix keyboard; LED indicator; Buzzer
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