Arduino to switch between 2 solenoid valves

Using Arduino Project Guidance
#1

Hi folks,

I am working on a project where I need 2 solenoid valves; both are N/closed and exactly the same. Only one will be open at a time, or both will be closed.

I am using this schematic which works fine for one solenoid valve: http://www.arduino.cc/playground/uploads/Learning/solenoid_driver.pdf

I want to use the same power supply for both solenoid valves. Can anyone provide a rough circuit diagram for this?

Many thanks, Ross

#2

Simply build two copies of that circuit. They can share the same solenoid power supply positive and negative power supply terminals and the arduino ground. Only difference is each circuit will wire to a different arduino digital output pin of your choice.

Lefty

#3