Compressor

This lorry is the powerplant for my funfair.
There are 4 9V outputs and 4 pneumatic outputs.
The yellow thing on the left is a pressure controller.
A small cylinder presses against a spring. These turn
an axle that is connected to a lego switch. When the
pressure is high enough the motor stops and when it gets
lower the motor starts again.





















Video here:
Compressor.mpeg