PC Interfacing Using USB

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For many years professional scientists, engineers and enthusiastic hobbyists have been able to connect computers to the outside world by using specialist interface cards inserted into slots in their computers.Times have changed and both desktop and laptop PCs now have Universal Serial Bus (USB) ports as well as serial and printer ports and as PCs have become more sophisticated, less available slots for the insertion of input/output cards.The USB port is popular for connecting printers, scanners, mass storage systems, digital cameras and other peripherals to a PC, and the interfacing enthusiast has had to look on with envy at these developments until now!Ravar Pty Ltd of Queensland, Australia have developed a USB interface module which is equivalent to an old 24-line parallel plug-in input/output card. This now re-opens the entire interfacing world to the computer enthusiast but without having to delve inside the PC.This book outlines the basics of USB, shows how the Ravar USB interface module can be connected to and programmed by the PC and explores how digital data, stepper motors, digital-toanalogue and analogue-to-digital converters can be used with the system.It strives to assist the user to become conversant with USB and provide a source book which can be dipped into at anytime whenever a interfacing project is being developed.