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PneumADDic II • Masterpiece 4 207
holds the pneumatic tubes onto the pneumatic connectors are over-powered by the pres-
sure and the weakest of the connections run the risk of disconnecting and depressurizing
the entire circuit.
PneumADDic II also needs to be alerted to when the system is up to pressure, so it
knows it is time to make the Carry Memory remember a new Carry value.
The Digital Pressure Sensor sub-assembly incorporates a medium piston, rubber
bands, a touch sensor, and a Potentiometer Brick sub-assembly. When the system is up to
pressure, the piston presses the touch sensor button. When the system is not up to pres-
sure, the rubber bands compress the pneumatic piston, releasing the touch sensor button.

Digital Pressure Sensor Step 0 Digital Pressure Sensor Step 1

Digital Pressure Sensor Step 2 Digital Pressure Sensor Step 3
Wrap the rubber
band around the top
bushing three times
(not shown in picture).
Do this for both
rubber bands.

The red rubber
bands compress the
piston to the closed
position, unless
there is enough
pressure from the
pumps to expand
the piston.