Abstract
The Data Acquisition Systems (DAS) are the basis for building monitoring tools that enable the supervision of local and remote systems. A variety of communications and data transmission system has been adopted DAS to exchange information. The special-purpose DAS has a very important practical value. This paper presents the circuit and system design for a new micro type of remote data acquisition system. It consists of an integrated circuit, a phone dialer, modulation devices, central processing unit, buttons, input devices and display devices. The system and circuit design has been described in detail. It can be used to transmit data through the public switched telephone network. It is suitable for constructing a mini scale communication network at low cost for data acquisition through the PSTN.
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