基于AVR单片机的无线红外通信系统设计

Design of Wireless Infrared Communication System Based on AVR MCU

文章应用红外通信方式实现了一个基于单片机红外光通信的模拟信号和数字信号的发射与接收系统。模拟发射部分采用PWM脉宽调制技术发射语音信号。接收部分采用带有滤波的光电三极管,解调出输入的语音信号。数字发射部分以AVR单片机为控制核心,发射温度信号,采用单片机的输入捕捉功能还原出温度信号,再显示当前温度。系统具有硬件电路简单、抗电磁干扰能力强、高速可靠、较高的集成性、性价比较高等特点,具有一定的参考和使用价值。

In this paper, the infrared communication mode is used to realize the transmit and receive system of the analog signal and digital signal which is based on the infrared communication of single chip microcomputer. Analog transmit part adopts PWM pulse width modulation technology to transmit voice signal.The receiving part adopts a photoelectric transistor with a filter, which is used to modulate the input speech signal. AVR microcontroller as the control core, the launch temperature signal, the microcontroller input capture function to restore the temperature signal, and then display the current temperature. The system has the advantages of simple hardware circuit, strong anti-interference ability, high reliability, high integration and high cost performance, and has certain riference and use value.