Here is my “Custom” OSPi.
I made this one in 2013, importing the pcb was just NOT feasible as the value of our currency it is just not worth it.
I see we now have a “Local” web store – http://www.opensprinkler.co.za
I also wanted a “Isolated” signal to the irrigation solenoids, so i used a opto / triac, circuit from the net, attached it if anyone is interested.
The output of the shift register drive the Opto, i used a low power unit.