Abstract
The traditional campus bell control system applies wired control system and there are difficulties in installation and wiring. This paper has put forward a wireless bell control system with the core of microcontroller AT89S52 microprocessor and 315MHz wireless transmission chip. The hardware design has realized the power circuit, minimum system circuit of the microcontroller, keyboard circuit, wireless transmission circuit, LCD display circuit, real-time clock circuit, EEPROM memory circuit, and ringing drive circuit. The software realizes the microcontroller-controlled program, real-time clock program, memory EEPROM reading and writing program, and LCD display program. The test results show that the clock is running accurately, with the maximum wireless communication distance of 1.2 Km.
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