I want to use an Arduino to 'fire' a soleniod pair. The two windings operate one armature with an 'over centre' spring in a "push me - pull you" configuration. They are normally fired by a couple of passing contact (momentary) switches. They operate on 16 to 20 volts DC, but I don't know the current they draw, which I would guess to be about 2A for less than one second. Obviously, both solenoids would not be fired at the same time! I may also need to use an electrolytic across the power supply to get enough 'punch' into the coil.
Any suggestions as to the feasability of this?