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March 04, 2009

Potato power

Jeff sends a link to this page of Amos Latteier's, which is complete with pictures.

500 lb Potato Battery

I built a potato battery out of 500 pounds of potatoes. It powered a small sound system. With the help of the Red 76 crew I installed the battery and sound system in the back of a U-Haul truck and drove it around town inviting people to enter the truck and take a listen. [...]

Each potato generates about 0.5 volts and 0.2 milliamperes. I connected groups of potatoes together in series to increase voltage and then connected these groups together in parallel to increase amperage. The entire 500 lb battery generated around 5 volts and 4 milliamperes.

He tells us the power he got, but not the energy. I'd like to know how many watt-hours this battery produced.

Posted by joke du jour at March 4, 2009 09:08 PM

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Comments

Something isn't right here. Not much of a "sound system" with 5V@4mA. You could light an LED with that, but not much more. That's .02W, at least at first. I doubt it would last long.

Furthermore, I'm surprised that 500lbs of potatoes aren't good for more than that. Something is wrong with his numbers.

Posted by: codewritinfool at March 5, 2009 01:00 AM

Well, 20 milliwatts probably would drive a set of earphones.

Posted by: JdJ at March 5, 2009 12:49 PM

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