I'm making a trigger circuit for a paintball gun. This will be my first IC and so the 555 timer is new to me. The timer will be used to control the firing of the gun. Since high pressure air is used to propel the ball, the solenoid valve has to be open for a precise amount of time. I already have a good feel for how to use the 555 to do this based on the info here. The gun has a micro-switch mounted to the trigger on the grip frame. When the micro-switch is depressed that's when a ball should fire. Right now I'm sorting out how to wire up the 555 and I'm wondering if I should use the micro-switch to operate terminal 2 on the 555 or do I use the micro-switch to power the entire 555 each time?
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