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If you had an IR torch would this work for night vision?
I think he mounted just the IR flashlight to the rifle
I've seen graphite and platinum been recommended as they wont be corroded (?), but any conductive metal will work. Mix bi-carb with the water to make it conductive, and you only need 1.23 V for electrolysis, a higher voltage with just generate more heat; more amps is what you need to create more bubbles.