Lovely water powered calculator mixes green and classy

This just goes to show what amazing things can can be accomplished when you mix tech, eco, and classy. It costs around 70$, and one water fill lasts about two weeks, depending on how much you use it. How does it work ? Well, each capsule contains two electrodes, copper (Cu) and zinc (Zn). When [...]

Introducing the water powered calculator

Here’s something fun for the math geeks, addicted to calculus. I know you’ve heard and probably used a solar based calculator (quite a popular attraction for eco snobs), but here’s something that might surprise you, the water based calculator! Add a few drops of water to the removable battery and insert it in the calculator [...]