频率波形发生器，通过按键来选择要输出的波形，可选择的种类是一定的，有锯齿波，三角波，方波，正弦波等-Frequency waveform generator to select the waveform to be output through the button, you can choose the kind is certain, there are sawtooth, triangle wave, square wave, sine wave, etc.

双机可调波形发生器，通过一片单片机的两路电压和按键输入，来得到输出波形的频率、幅度、种类，然后发送给另一个单片机来产生特定的波形-Dual adjustable waveform generator, via a microcontroller and two key input voltage to obtain the frequency of the output waveform, magnitude, type, and then sent to another microcontro