You will need:
- Eight zinc-coated nails.
- A paper towel cut into eight 1.5" x 1.5" patches.
- Uncoated copper wire.
- A cork.
- Lemon juice.
- An LED. This project works best with an LED that has a low forward voltage and low forward current. I used a 1.6v 1mA LED. Other LEDs may work but may require more cells to light up brightly.
See captions for details.
Step 1: Wrap the Petals
Step 2: Assemble the Flower
Step 3: Connect the LED
Twist a 2" length of copper wire around the LED's negative lead, and wrap the other end around the remaining unconnected nail head (which is your battery's negative connection).
Step 4: Light the Flower
If the LED doesn't light, check that all of the connections are good. Make sure that on each petal, the copper wrapped around the paper towel is not touching the copper wrapped around the nail head.
The LED should stay lit for half an hour or so until the paper towels dry out. You can light it up again simply by adding more lemon juice.
Try adding a stem, leaves, and a flower pot. Try using other kinds of metal. Try making the petals out of metal foil instead of wire. Experiment! Have fun!