With the development of electronical scientific technology, electronical measurement became a technic that everyone of engaging electronical had to master it. What’s more, the precision is higher and higher and, the function is more and more powerful, and voltage’s measurement is best important. Primarily, I designed a Digital-Voltmeter use MCU technic with A/D-switch chip(ADC0808) base on lots of predecessor design.
Digital-Voltmeter is (A/D) transforms the principle using the mold/number, is measured traces draws up the quantity to transform the digital quantity, and will transform the result to send in the monolithic integrated circuit to carry on the analysis, the operation and processing, finally one kind of measuring instrument which will demonstrate by the digital form. A/D transforms including to simulates the quantity sampling, again carries on the sampling value quantification processing, then process which transforms through the code realization.
In this article, introduce some methods that design Digital- Voltmeter and the advantages of use MCU system to do it on the first; then treat the procedure of design of direct- Digital-Voltmeter, contain the hardware and software.