Hello, dear freaks!
I'm planning a project for programmable garden irrigation. The idea is to have huge containers with water and several bistable electromagnetic valves connected in parallel to them so I'll be able to drive them with my AVR. The valves require positive pulse (3.6 .. 6 V, >= 30 ms) to open and negative pulse to close. I've already experimented with them by shortly connecting supply wires to different battery leads and all seems fine. The most obvious solution that came into my head is to use single H-bridge per valve to implement it. But I wonder if there some more elegant ways exist and pros/cons of them, if any.