chemical

Chemical:

Potatoes or citrus fruits batteries: Utilising electrochemical properties of these vegies/fruits to create electrical circuits: []

http://www.youtube.com/watch?v=k7Sz8oT8ou0&feature=player_embedded

[] Explains how it works as well! Definitely worth a look if you don't understand how a chemical generator works (a battery). This website uses the same principles in this generator: http://www.youtube.com/watch?feature=player_embedded&v=qbK4cl2bkOE But this generator uses salt instead of acid from the fruits.

DP.

Thank you DP for having added all these links! Answered a lot of my questions about how the generator actually worked!