A couple of weeks ago I decided to design a PCB to act as a carrier for the XMC4700 Relax kit and the DPS368 Pressure Shield2Go module.
The carrier board arrived and I have begun assembling its components.
To control the sprinkler I purchased the ROB-10456 which is a solenoid valve manufactured by Spark Fun.
The solenoid valve requires 12V to essentially turn on the water.
On the underside of the carrier board I've included a switching regulator circuit based on the LM3478MA.
The switching regulator circuit, which can be seen on the lower right hand side of the image below, is used to generate 12V from 5V.
And now to test it......
12.4V is higher than expected and is probably the result of the circuit being open load.
At any rate it's close enough for rock 'n roll. 
