Tell us about yourself!
This may be an Instructable, but it doesn't give any information on how this works. Seems to me it's just a way to sell these 12V solenoid valves. Lets have some code examples rather than a preconfigured SD card. Goodness knows what spam you might be putting on it.
Chimera: $60 DLP High-Res 3D Printer
Makey Makey Electronic Melodica