"基于AT89C51单片机的数字语音录放系统设计"

This paper presents the design of a real-time speech recording and playback system using the AT89C51 microcontroller and ISD2560 voice chip. The system is able to record up to 60 seconds of audio, playback the recording, and control the volume and playback functions using buttons. The system consists of three main modules: the microcontroller control module, the voice recording and playback module, and the power amplification module. The microcontroller control module utilizes the AT89C51 microcontroller to recognize button inputs and control the operation of the voice recording and playback module. The voice recording and playback module is responsible for processing, storing, and reproducing the audio input. The power amplification module amplifies the reproduced audio signal to improve clarity and volume. The design process includes overall system design, hardware circuit design, and software design. The key words include AT89C51 microcontroller, voice recording, and voice playback. Overall, this system provides a comprehensive solution for real-time voice recording and playback with flexibility and control.