Hi Coyote,
The hardware is almost complete. I am using 40 Solenoid valves 24VDC 260mAmp.
Here is the PCB sketch where i am using Qty:05EA shift registers 74HC595 and the PCB also serves as a simulator with 40 LED installed. The PCB also contains 40 IRF540 to drive the solenoid valves.
Here is the completed PCB:
and here is 6inch diameter PVC Header pipe with 40 drains dia 8mm each. The Pipe also have connections for inlet / outlet of water supply.
Here is the solenoid valves i am using for this project:
Here are the 40 solenoid valves attached to the rig.
A small video where i am experimenting with a single solenoid valve. the simulator also works great:
