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these relay control boards may help...
Yup, I'd seen some of those, but not all, thanks. I also found this one
which seems nice,
http://microcontrollershop.com/product_info.php?cPath=346_349&products_i
d=2192 and the price is decent. 24 controls @ $119 is about $1000 for
the controllers alone. Not ideal, but not outrageous. I can add on
http://microcontrollershop.com/product_info.php?cPath=346_350&products_i
d=2195 as a relay controller too.
You're right, the devil is in the valves. I was thinking of some sort of
solenoid type setup, but there's also the question of response time. I
think if we can control the flow @ less than 50ms we'll be ok, but 20ms
would be better. 50ms gives me 20 cycles per second, which I think will
be borderline to do any real control.
Luckily the software side is rather trivial as you're just "printing" a
true black and white bitmap w/192 horizontal bits one line at a time.
-Walden
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