Re post #1726The effect of power failure was something I didn't take account of for the 7812(s) used in the Tide and Wave Controllers
. Apologies, Joe. Those should be revised by connecting a reverse-biased diode between the input and output terminals of the/each 7812. If you have a spare 3A Schottky that will do nicely (although a bit OTT).
That's an option (which would avoid having to add diodes across the 7812s). Or Joe may prefer to keep the control of the other pumps entirely separate.