This is a small Lego compressor, consisting of two small pumps and a small piston for pressure monitoring. The system of the compression unit and the pressure sensor is from ,,NXDave''. I built my version here, and i have wrote a program and an instruction manual.
The Compression unit:
The compression unit comprises a NXT-Motor, two small pumps, a small piston, two touch sensors, two air tanks, a pressure gauge(Manometer) and two switches.
The Control Unit:
The control unit is a NXT-Brick with two switches for additional tasks.
The Program + Building-instruction:
The program includes an auto-stop system at elevated pressure (2.5 bar), a temperature warning system at long use (3 minutes) and a contolsystem if a motor is connected.
I have attached a LDD file and some pictures. The program comes, because i cannot upload the program :-(