Orange Juice Clock
In this demonstration a galvanic cell is made from a combination of a magnesium strip, a copper strip, and juice in a beaker. The current from this cell is used to drive a clock normally powered by a DC battery.
The size of the movie file is 1.4 MB and its duration is 22 seconds. The name of the movie file is "OJCLK.MOV" and it is located in the folder "MOVIES/OJCLOCK".
If your browser has not brought the movie into the above space (you might be running a version of Netscape earlier than 3.0 or not have the proper plug-in), clicking on the following will possibly access the movie. Play movie.