I need to control some remote solenoid valves. I’m aware of the standard answer for this: http://arduino.cc/playground/uploads/Learning/solenoid_driver.pdf
Because these are located 10+ft from the controller I do not want to have power running to the valves at all time. There is just too much danger of a short or accidental grounding. Instead I want to switch the current TO the valves. There doesn’t seem to be much information on setting things up this way.
I did come across this example but it seems like there has to be an easier way to do this. I need to control 4 valves which means making this 4 times. Are there any other options?