Please do not send me internet links to "prove" Meyer's devices work.
Remember, it is you who needs to prove your Meyer device. Use your electronics background. Use good math. Use your electronics degree, and produce a Meyer device. That is the bottom line.
And Thermodynamics is a set of LAWS that is added to constantly. It is proven everyday in it's application. It flat out WORKS!
As to your last challenge for calculations, I'll give you the start, and you can furnish the answer as an exercise in learning.
Take one Mole of water molecules. It can be dissociated to form one mole of oxygen and two of hydrogen. Both form diatomic pairs. Run this molar mass into the gas laws at STP and you will get the volume of HHO produced from one mole of pure water ( 18.02 grams). Divide the 18.02 into a thousand to get the result from a liter stand point. It is a surprisingly large number.