Travis has enjoyed learning about circuits lately, and today we tried to make our own battery! This is a bit of a spin on the old potato battery experiment you might remember from elementary school.
For the set up, first we washed a penny in warm soapy water to make sure it was clean.
Cut two small slits in a lemon, about 3/4-inch wide and deep enough to reach the lemon juice under the pith. The juice is key!
Fold a square of aluminum foil in half and then half again, so that it makes a sturdy strip. Insert the penny into one slit of the lemon and the foil into the other, making sure both touch the lemon juice.
Now you can test your battery! The easiest way is to do a reading against the two nodes of a multimeter. Alternatively, try attaching alligator clips and wires to an LED light, and see if you’re able to power it up.
We didn’t have fantastic success with our “battery”, which might have been because our aluminum strip was too long, or perhaps was due to a slightly faulty multimeter. If you do the project, please share your results in the comments!