My adventures with Kicad continue. I was going to make the solenoid control circuit on a piece of veroboard but decided to use Kicad to design a PCB instead. I've recently moved from Windows XP to Windows 7 and my old electronics design software will not run without tweaking. As a result, this has become an exercise in PCB CAD package education as well as the water gun itself.
Here is the single sided PCB I've designed:
I'm not going to make it though until I have tested the water gun with the solenoid valve I have to see if it is suited to pulsed operation.