V2 code vs. block diagram: seems like the code is written for a simpler mechanical config

[rswarner]

Hello. I loaded the V2 arduino code and built a machine based on some assumptions/things I learned by running the code using LEDs along with the FETs for the valves.

It seems like the code is only referencing three valves per side. That pointed me to this configuration:

The valve at the bottom of each chamber is zeoliteIn The valve on the inboard side of each chamber is zeoliteOut The valve on the outboard side of each chamber is airVent

I have this running at about 3 bar, and am using a zeolite (not the recommeded stuff) called Clinoptilolite. A brief search for info on its nitrogen affinity led me to believe it MIGHT work. It's available as "Sweet PDZ Horse Stall Refresher." I bought 25 pounds for 11USD. I haven't yet convinced myself that the output gas has any obvious increased oxygen concentration.

Did I get the configuration of the machine correct with the assumptions I made about the V2 code?

[nerd22]

You could use a car Lambda sensor to determine oxygen level. I have gone off the idea and will be going for electrolysis.

[f4grx]

https://en.wikipedia.org/wiki/Oxygen_sensor

The sensors only work effectively when heated to approximately 316 °C (600 °F)

[nerd22]

They have a built in heating element for that purpose.

[rswarner]

I did manage to talk a local dive shop owner into checking the O2 concentration of my output gas. His sensor calibrates to 20.9% in room air, and it measured a whopping 21.1% in the sample. I will source some proper zeolite next, but I still don’t know if this machine configuration is the current design. Can someone answer my question above about the three valves/chamber named in the code vs. the most recent block diagram?

[RepRapLtd]

I think you have an old version of the code. The current code (which compiles but is untested) references all four valves per side.