1 引言
這是一個(gè)很容易建立并且非常準(zhǔn)確和有用的數(shù)字電壓表。它被設(shè)計(jì)成一個(gè)面板儀表，可用于直流電源供應(yīng)器或其他需要有一個(gè)準(zhǔn)確電壓指示的地方。該電路采用的ADC（模擬數(shù)字轉(zhuǎn)換器）集成電路CL7107由Intersil公司生產(chǎn)。該IC采用40引腳的情況下整合了所有必要的電路模擬信號(hào)轉(zhuǎn)換為數(shù)字，可以直接驅(qū)動(dòng)4個(gè)7段LED顯示。在IC中內(nèi)置的電路是數(shù)字轉(zhuǎn)換器，比較器，一個(gè)時(shí)鐘，一個(gè)解碼器和一個(gè)7段LED顯示驅(qū)動(dòng)器模擬。在這里它描述了一個(gè)可以顯示在0-1999電壓范圍的直流電壓電路。
Copyright of this circuit belongs to smart kit electronics. In this page we will use this circuit to discuss for improvements and we will introduce some changes based on original schematic
General Description
This is an easy to build, but nevertheless very accurate and useful digital voltmeter. It has been designed as a panel meter and can be used in DC power supplies or anywhere else it is necessary to have an accurate indication of the voltage present. The circuit employs the ADC (Analogue to Digital Converter) I.C. CL7107 made by INTERSIL. This IC incorporates in a 40 pin case all the circuitry necessary to convert an analogue signal to digital and can drive a series of four seven segment LED displays directly. The circuits built into the IC are an analogue to digital converter, a comparator, a clock, a decoder and a seven segment LED display driver