I have a latching solenoid valve laying around, the original controller is broken and I'd like to make it work using a uC. I don't have the electrical specs of the valve. The broken device was using a 9V battery so I guess the latching valve works at around 9V. When I try it on my workbench without water and apply a short 5V pulse it clicks in and out so it looks like working. But I'm not sure it will work when there is water pressure. Anyone has experience on these type of valves? Is there any dependency between the applied voltage and the water pressure? Or can I make the simple assumption that if it works without water it will also work with water pressure? Thanks in advance for any help, Pedro
EDIT: Add some photos
The controller has two 9V PP3 connectors for two 9V PP3 batteries. It looks like they are using a transistor to select the battery, so they might be with reversed polarity, in order to make the positive or negative pulse to the valve.