基于555芯片的多功能波动演示装置设计与实现

The Design and Implementation of the Multifunctional Fluctuations Demonstration Device Based on 555 Chip

该装置是利用555数字芯片制作信号发生器，产生低频可调的方波，经积分电路，产生三角波和正弦波，再由tda2030组成的功率放大器放大，输送至扬声器，使其起振的装置。将该装置放置于水中，把水波视为一种机械波，则可以作为波的干涉、波的衍射以及多普勒效应的教学演示装置。从信号发生器中产生的三种波形，也可以作为相同频率和幅度的三种音频信号的差异的教学演示仪，以及驻波的演示。该装置是可调频调幅的，教学演示的范围广。

A device is produced using the digital chip 555 to make signal generator that can produce low-frequency tunable square wave through the integral circuit,to produce the triangular wave and sine wave,and then amplified by the power amplifier TDA2030 composed.The wave delivered to the speaker, to start-up itself.The device placed in the surface of the water, and the waves as a mechanical wave,can be as the teaching demonstration device of wave interference,wave diffraction and the Doppler effects.The three waveforms from the signal generator can also be as a teaching demonstrator that distinguishes the identical frequency and amplitude differences between the three audio,as well as VSWR.The device is tunable frequency and amplitude,and has a wide range of teaching demonstration.