Here's one possible solution:
http://www.sealevel.com/catalog/8007.htm
This card will give you 32 relay (solenoid?) drivers. Other cards with
different I/O specs are available.
Sealevel provides Linux driver modules -- source. It's very easy to
use. Your program talks to the board (telling it which port to turn
on/off) by opening a device file (/dev/dio?) and writing to it as if it
were a flat file using fseek(). You can use python or other scripting
languages as long as they have the open() write() and fseek() commands
or their equivalents.
Now you have CONTROL!
Ed.
Chuck Hast wrote:
> Yep, I need to control a whole sprinkler and watering system.
>
> I have looked at commercial sprinkler controllers and what I
> saw did not do exactly what I want to do, so my question is how
> hard would it be to set up a LINUX box to control about 20
> valves turning them on and off at different times?
>
>
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