[RoboChair]

You also have the option of a 2 position single acting solenoid. The difference being that the valve has a normally closed/open configuration which moves to the default position unless power is being supplied to the solenoid. The awesome benefit of using this type of solenoid is that at the end of the match when your robot powers off, the solenoid does as well and will return to the default position. So it you have an intake that uses one, it would lift back up at the end of the match. If you use it on a climber mechanism, you don't have to rely on pushing a button to trigger the climb, you just have to get it hooked on before the buzzer.