Presently, instruments used in manufacture to measure quantities or control operations of various system are mostly designed in using of a computer as a controller and data processor. Because, the computer accept only the digitalized data, where as the quantities to be measured or the operations to controlled are analog, it is necessary to provide an interfacing unit which can convert analog signals to digital and digital to analog in vice vesa.While some system need digital signal ,too. This project report is designed a circuit that convert analog to digital and digital to analog control by DELPHI. This interface card can interface of IBM PC by using of the Multiplexer I/O Port . Find Abstract
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Data Processor
Presently, instruments used in manufacture to measure quantities or control operations of various system are mostly designed in using of a computer as a controller and data processor. Because, the computer accept only the digitalized data, where as the quantities to be measured or the operations to controlled are analog, it is necessary to provide an interfacing unit which can convert analog signals to digital and digital to analog in vice vesa.While some system need digital signal ,too. This project report is designed a circuit that convert analog to digital and digital to analog control by DELPHI. This interface card can interface of IBM PC by using of the Multiplexer I/O Port . 
