The Automatic Button Pusher

Step 11 Modify The Actuator

Since the actuator will only be powered in one direction we need to make sure that it will stop pushing the button after the time cycle. We are going to do this mechanically by using a small rubber band as a bungee to pull the piston back in.

I used a hacksaw to cut a small slot in the tip of the actuator so that I could keep the rubber band in one piece.

I used a washer with screw as a flange to make sure the band doesn't slip off.