Anyone ever consider Hydrogen, or Steam?

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I think either one of this sources has the potential to be pretty cool. Unique if nothing else. For hydrogen you could either use a hydrogen cell, and a reactor, OR you could implement your own hydrogen extractor (wrong word?) and have a robot that ran on water https://www.newsforpublic.com/hydrogen-water-secret-effectiveness/ . Now that would be cool! especially if it was some form of aquatic bot.

Steam on the other hand would also be relatively easy to do. I bet you could even make little steam powered servos. Although I’d love to see a pneumatic steam robot build all out of brass and wood ah la steam punk. Infact, if and when I ever build me a bipod, I’d love to atleast make a brass tubbing super structure…

Forgive me if I am mistaken, but electrolysis is a relatively simple process involving nothing more then a battery, some graphite electrodes, and some salt water.

Seems pretty simple, I really like their design for the actual system.
The next step would be to figure out how to harness the hydrogen.
Ideas?

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RobotShop used to carry Horizon Fuel Cell (horizonfuelcell.com) educational kits which powered small robots. They had a few methods to create the hydrogen needed - a wind turbine; a small solar panel and a plug-in generator / station, and stored it in a small pressurized tank called a “hydrostick”. The same approach has been used to power drones.
Ex: https://www.energylivenews.com/2019/02/18/hydrogen-drone-stays-in-the-air-for-nearly-11-hours/
The process (in its entirety) is obviously more complex than charging a battery, but it does have some distinct advantages.
Toyota’s Mirai is hydrogen-based and they are trying to promote it by offering free hydrogen fueling.
Most people associate Hydrogen with “boom”, so having the general population accept it is likely the challenge.

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