9 Interfacing
This chapter aims to introduce readers to the general principles of interfacing sensors and transducers to PC bus I/O cards. We shall describe a variety of common sensors and transducers and, for those who do not wish to make use of ‘off-the-shelf’ signal conditioning modules, details of the circuitry necessary to interface such devices to several commonly available I/O cards has been provided. Before embarking on this task, it is perhaps worth mentioning some of the more important characteristics and limitations of conventional digital and analogue digital I/O ports.
Characteristics of digital I/O ports
The digital I/O ports provided by most PC expansion cards are invariably byte wide (i.e. each port comprises eight individual ...
Get PC Based Instrumentation and Control, 3rd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
