The Nano-Tech Water Drop Puzzle is simply a puzzle that cleverly exploits surface tension in water to allow you to use individual water drops instead of marbles or metal bearings in a toy.
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It seems as if the water-powered gadgets are becoming a bit of a trend. The water-powered green gadgets typically seem to be very low powered and use a small LCD screen. This new water powered calculator has a small re-fillable cartridge that will power the calculator for up to 3 months with just a few drops of water!
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I recently reviewed a water powered desktop calculator, and now there’s a Water Powered Clock. Using a combination of water and salt, the clock electrodes generate a current sufficient to power the clock for quite a while. This eco gadget is bright and colourful, and it’s bound to attract attention if you’ve got it on your office desk!
Source: Bedol via Coolest-Gadgets
This neat calculator uses a water-based battery to generate enough current so that you can do your sums with the environment in mind! Just top this eco gadget up with some water and it will run for up to 3 months until the water has evaporated. Then you just need to top it up again.
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