I'm setting up a watering system in my greenhouse. This is a 12v DC system.
I have three timers, each controling its own solenoid valve + a shared water pump.
How do I prevent current from going to the other two valves when a single timer (and its valve) activates?
I've tried experimenting with Schottky diodes which I have plenty of - but with no luck. Its been mostly trial and error since I am not very strong in the theory of this.
A very (most likely naive) idea of how this should work. I had the idea / understanding that Schottky diodes could prevent current from "going back" / "backfeed" to the other valves. However, this obviously does not work.
The diodes I have tried to work with (1N5822):