DIY Water Powered Calculator

by Ally

Instead of purchasing an eco-friendly water powered calculator and tossing out your old one, only for it to slowly rot in a landfill, you could make your own.  It seems to be a whole lot more eco-friendly to convert your current items into something eco-friendly rather than replacing the gadgets you already own.  Thanks to a tutorial, you could easily make your own earth friendly calculator.

The tools you’ll need include a calculator, carbon or copper rod, a 1 by 1 inch piece of aluminum foil, a small cylindrical container, two 3 inch wires, multipurpose pliers and a glue gun.  The materials are pretty basic, nothing you couldn’t get from your local hardware store.  I imagine this will work like any other calculator powered by water.  You just need to make sure to refill the battery with water when it’s needed.

Source: Instructables

6 reviews or comments

Nick Says: July 11, 2010 at 2:40 pm

For a site that writes on gadgets, I would have assumed you had a basic understanding of chemistry and would have caught this. This calculator is not being powered by the water. The instructable simply has you construct a simple battery using water as an electrolyte. The energy comes from the reaction between the two electrodes, which will eventually wear down, yielding a “dead” battery.

Angelo10 Says: July 13, 2010 at 3:02 am

That my project from Instructables. I am 12 years old now. It just works like a lemon battery but uses water instead.

Here’s a link:

Angelo10 Says: July 13, 2010 at 6:03 am

If people redirect this please give credits to the person who did this: Me (angelo10) thanks!

John Says: October 1, 2010 at 10:31 am

LOL What a shame that someone who should know something about electronics does not even know how a battery works. Water doesn’t power the calculator, the degrading electrodes are powering the calculator through a redox reaction.

I love gadgets and stuff, but I was expecting more from a well established gadgets website. What a shame..

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