ABSTRACT
Various signals are an important part of correspondent area. In this area, sine wave, triangle wave and square wave are common signals. In science research and teaching experiment, we often need the occurrence equipment of these signals. In order to make the experiment and research easier, to develop a suitable, full functional and easily used signals source is essential.
This design mainly use the AT89C51 and DAC0832 to produce the low frequency sources of different signals. Its signal range and frequency can be controlled by requirement. In this paper, we briefly introduces the use of central processor to generate three kinds of waves, they are triangle wave, and control wave form choosing, frequency, range, and displays them through liquid crystal display of LED. Moreover it adds clock procedure, and displays it. Besides, it has clock function. In general, this design includes three modules. They are D/A conversion module, wave generate module and liquid crystal display of LED module. In this design, the wave generator into wave form module and D/A conversion module are discussed in detail.
Keyword: MCU, waveform generator, DAC0832