Design of a Single Microcontroller based 29-Channel Data Logging System

Development of Data Logger is changing rapidly with the advancement of electronics. Data, collected from the process, is affected by speed matching problem, circuit complexity, and by limitations of the application software. The number of channels in a low cost data logger for a small system varies from one to eight. This paper describes an inexpensive, easy-to-build, microcontroller-based, data logging system with a single microcontroller that may be used in different field applications. In the present paper, a system is described, which has been developed to increase the number of channels keeping the cost as low as possible or constant, with simple electronic devices. This data logger is capable to update 29 channels data within one second. This system also records the data in a database and plots the variation of data in the form of a graph, like a real time system. All the data acquired by the system basically comes through different channels and is logged into the database. Finally the application software is typically used to store the data in the database with date and time until the system is stopped.