Manual continous flow set-up online

A project log for Mobile continuous gas mixing controller

Continuous gas blending for scuba breathing mixes.

erikhErikH 06/01/2018 at 12:230 Comments
Right...  Long time no update. But good news, the manual version is up and running. The mixstick operates as it should and the normaly closed oxygen shutoff valve (2) works. A socket (1) is connected in parrallel to the electric motor and provides power to the shutoff valve when the compressor is running. This way the shutoff prevents oxygen from pooling in the mixstick/hose when the compressor switches off (which could lead to Bad-Things[tm]). Next up is a microcontroller controlled safety shutoff at 40% O2. Parts are ordered, so stay tuned :) When that works, automatic flow control is ofcourse next! Pictured below is the compressor (Bauer Junior 100L/min) and mixstick.