I have been working on a pressure switch which will be an essential part of our multi stage rocket next year. The idea came from Air Command Rockets.
The pressure switch is made from a old TV remote control button. The membrane and the circuit of a single button are sandwiched in between to small metal plates. This in theory should seal the air inside the rubber button. This is then placed inside the pressure chamber.
As the pressure chamber is pressurised, the air pressure forces the button to be pressed and hopefully presses the contacts on the circuit board. When the rocket launches, the pressure will fall and the button will depress, disconnecting the circuit. A circuit will look for the switch disconnecting and will then trigger the staging mechanism. I am hoping to test this soon and will report findings.
