主要目的是利用单片机以及TLC549芯片进行A/D转换，将模拟电压转换成数字可直观显示的电压的过程。把待测模拟电压信号信号输送到模数转换芯片TLC549进行转换，转换后的数据通过单片机进行处理，最后用LED进行显示。（附有PROTUES仿真图）

-The main purpose is the use of single-chip and TLC549 chip A/D conversion, the analog voltage can be converted into digital visual display of the voltage process. The analog voltage signal to be measured is sent to the analog-to-digital conversion chip TLC549 for conversion, the converted data through the microcontroller for processing, and finally with the LED display. (With PROTUES simulation map)