频率、幅度、占空比可调方波，有proteus仿真，可通过示波器查看，按键 12调整频率 34调整幅值 56调整占空比 -Frequency, amplitude, variable duty cycle square wave, and proteus simulation, can be read through the oscilloscope, adjust the frequency of 34 keys 12 to adjust the amplitude to adjust th

使用89S51单片机开发系统，和D/A转换器产生各种波形，并且在示波器上可以显示，频率可调。-Using 89S51 microcontroller development system, and D/A converter produces a variety of waveforms, and can be displayed in the oscilloscope, frequency adjustable.

单片机P1.0脚输出频率范围1Hz-1000 Hz的正弦波、方波、三角波、梯形波、锯齿波，并用示波器观察。要求频率可调-MCU P1.0 pin output frequency range of 1Hz-1000 Hz sine wave, square wave, triangle wave, trapezoidal wave, sawtooth, and with the oscilloscope. Required frequency adjustable

用1264显示的简易示波器，可以采集波形并在12864上显示，有四个频率范围可调。-1264 with a simple display of the oscilloscope, waveform can be collected and displayed on the 12864, there are four adjustable frequency range.