Water powered calculator how does it work

But what ever you do, never give up, specially when you fail. Use your failures as your guide and try and try again, later on you will succeed. What an interesting instructable!

Thanks for sharing! I think you should explaing why it works scientifically. Great tutorial, my first try I had water leaking from everywhere and only a mere. Vinegar is NOT the best solution.

I have tried and what seems to work best is Lemon Juice and Salt. The picture has two batteries in series which add up to a good 1. However, for some reason I cannot get a light to turn on. My guess is that voltage reading stabilizes with a circuit, but the bulb cannot stabilize.

Might also be the amperage not being high enough. Reply 10 years ago on Introduction. Nice job. I recommend you to clean each carbon rod carefully, there's a lot of manganese sticked on it. Second both metals should not touch. Third if none of this work make 2 more of this in parallel. Reply 11 years ago on Introduction.

Nicely done! It's sad that teachers don't encourage these projects in school! Every student should know these tricks. Question 3 years ago on Step 7. Introduction: Water Powered Calculator Original.

Because the power consumption of LCD devices is so small those electrodes should last a long time, but not indefinitely, hence the stated lifetime. The product offers the "freedom of not having to buy batteries again", but the manufacturer also has replacements are available, if a little pricey. I have a pocket calculator that has used the same tiny mercury cell for over last twenty years.

Over that period I could expect to have tossed at least half a dozen or so of these "green" batteries. Let's look at these water batteries in more detail: The endless supply of electricity lasts for "at least two years". Verdict: If you want a fun gimmick; great. Are Hpowered cell phones and MP3 players next?

Via Gadgetastic. Be respectful, keep it civil and stay on topic. We delete comments that violate our policy , which we encourage you to read. Discussion threads can be closed at any time at our discretion. Benefits add up for water-powered calculator Add a few drops of plain tap water to the removable battery and insert it in the gadget for up to three months of use.