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http://en.wikipedia.org/wiki/Programmable_logic_controller

Is that the sort of device you need?

Walden H. Leverich wrote:
All,


I'm looking to do a pet-project where I want to control the flow of
water via a PC. I need fast on/off, and I need to control ~200 different
valves. We're trying to produce something like
http://www.youtube.com/watch?v=Z2LUz2WVcek for a prom. Any ideas on a
device capable of the control? I have no problem doing the programming,
but I need something that will give me the ability to control that many
devices.


Ideally this would be a simple UDP attached controller that took a 24
byte packet and set the on/off status of each of the switches based on
the bit value in the packet.


-Walden


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