Pressure Regulator

This is a closeup of the pressure regulator. As the air pressure builds up, the yellow piston will raise. The blue angled pieces connect to a Lego polarity reversal switch. These switches have a dead zone, and when the pressure is high enough, the switch enters the dead zone and the pump motor turns off. When the pressure drops, the red elastics pull the piston down and cause the switch to reactivate the pump motor. This is basically just a copy of Ralph Hempel's design. Smaller...
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Copyright 2006 by Dave Hylands