Design of Intelligent Speech Electronic Whiplash

Based on the large market demand of teachers and students for electronic teaching whip, a teaching whip that can integrate voice transmission system and control computer PPT playback, page up and down, laser indication and other functions is designed. According to these functional requirements, it is necessary to realize the propagation and restoration of speech function through speech control and modulation and demodulation, and the conversion, modulation and demodulation of data signals to control the PPT page turning function of PC. The main control chip involved mainly includes AD conversion and analog keyboard chip. The main control chip includes STM32, STC15 series single chip microcomputer, DSP for speech signal processing, standing microphone for speech sampling, power amplifier circuit reduction amplification. The DA handles and simulates the key value of the keyboard. Finally, the function of speech transmission amplification and control of PPT page and laser indication is realized.