[ 2009-05-31 10:13 ]
No matter how far man gets with his fancy gadgets, he still depends on nature for all his energy needs--and that is exactly what designer Anna Gram wishes to convey with her Citrus Clock.
The clock derives its energy from electrolysis of the citric acid and this helps you leave those toxic batteries away. All you need to do is cut a lemon in half and place each piece on both spikes of copper and zinc and you're good to go. Technically, it's almost the same principle that Mr. Volta used to invent the battery in 1799: electrolysis of zinc and copper (the spikes under the lemon) in a salted or acid liquid (the lemon).
Ergonomically styled, the simple clock can run for a whole week powered by a single lemon. If you happen some of the stuff in your back garden, then there is no reason why you shouldn't switch over to an eco clock.