Summary Notes :
DVM = digital volt meter MVS = milli volt source
Here are examples of an analog Input and Output interface for Printer
Port. There are two visual basic demo programs with source to test out
idea.
USB and wireless interface to PC may be more in vogue, but a higher
speed is possible in printer-port. For analog and digital fast data
acquisition, PC cards to full Access to PC bus are the best choice.
The Sensors and Actuators interfaced with a computer form a basic
automation system or even a robot. So learning to interface Sensors
(input devices like a thermocouple or pH sensor) and Actuators
(output devices like a motor or heater) with a PC is the best way to
start. It is by studying examples and experimenting cautiously can one
learn the science, book reading alone will never help.
See the Hardware Book
connector details, cables, adapters, etc. The RS232-Serial
Port, The Parallel- Centronics port, The USB-firefire port are good to
start with. Then you can interface by LAN or Wireless- LAN or
TCP/IP-Internet to make Robots or Automation extend to multiple places
and computers. The possibilities are endless, imagination is the limit
for students.
But entrepreneurs need to be practical and only make equipment
that have a utility and sensible market scope.
The circuits and code have some errors, The documentation is not
complete.
Anantha Narayan 14:09 30-Mar-07
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