DIY Hydrogen/Oxygen Generators From Grocery Store Items (HHO Fuel Cells & Split Cell Electrolysis)
I had a lot of fun doing these experiments about 12 years ago. I ended on some conclusions. Straight DC is okay, but when you get to playing around with pulsed DC, you can really go crazy. I ramped my voltage up to about 5KV and was able to adjust my frequency to about 1-2 kHz and able to adjust the duty cycle as I saw fit. Last set of toying with it was to use pure water with no electrolyte, and having a resistance monitoring system to automatically adjust the duty cycle based on water quality. And that's when I reached the end of my skill set. I'll hit it back up when I learn to code.