St Aiden's Homeschool – Our Other Blog

April 22, 2009

Science for Kids – How to Make a Potato Clock

Filed under: Science — Donnette E Davis @ 4:26 pm

How to Make a Potato Clock

from wikiHow – The How to Manual That You Can Edit
Learn about chemical reactions while building a clock that runs on potatoes.


  1. Separate potatoes calling one A, and the other B.
  2. Place one galvanized nail in each potato.
  3. Place one copper nail in each potato insuring that the nails don’t touch.
  4. Remove battery from clock. Take notice of the batteries polarity in relation to how it connects to the clock.
  5. Connect first jumper wire from copper nail of potato A to the positive terminal of the clock.
  6. Connect second jumper wire from galvanized nail of potato B to the negative terminal of the clock.
  7. Connect third jumper wire from the galvanized nail of potato A to the copper nail of potato B.

Things You’ll Need

  • Battery operated LCD clock(1.5V-2V).
  • 2 large potatoes.
  • 2 copper nails.
  • 2 galvanized nails.
  • 3 jumper wires with alligator clips on each end.

Related wikiHows

Article provided by wikiHow, a wiki how-to manual. Please edit this article and find author credits at the original wikiHow article on How to Make a Potato Clock. All content on wikiHow can be shared under a Creative Commons license.


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