[[Datei:MembraneBreathCtrlPlexiGluedView2.jpg|400px]]
The membrane consists of a circular patch cut from a rubber glove (I used a black Nitril glove). A small magnet is placed on top of the membrane and fixed using another magnet on the opposite side. The membrane is held in place using a rubber O-Ring and a press-fit acrylic ring on top - so the membrane can be easily replaced without any gluing.
=== Instruments ===