I've decided to try my hand at building a working LEGO Concrete Block Making Machine, as shown in this picture:
with the idea being that the machine will be controlled by both manual and automatic input. The machine will be controlled by a pneumatic air system using various cylinders.
The manual control is the easy bit, as it's just a bunch of levers next to each other. The problem comes in the form of the automatic system whereby the Technic controller needs to be able to control a pneumatic valve bank in order to run the machine.
My question is this, does LEGO make an electronically controlled valve bank? If so, where can I find one? If not, what would be the best way in accomplishing this?