The PCB-board:
The PCB-board has two functions. The normal function which is that it contains some electronic circuitry and PCB mounted buttons, but it also functions as part of the construction that keeps the Electrumpet together.
The PCB-board is fixed under the top parts of the normal valves of the trumpet. The metallic frame is then clicked on the PCB-board fixated by both the top parts of the valve (around but not under it) two clampes hold the construction on the leadpipe of the trumpet.
The circuitry on the PCB board is simple. Only potmeters are used as modifying electronic components next to the sensors and switches. Mostly as a series resistor in combination with the pressure sensors and the ribbon controller. You can find the layout on the PCB board here.
