LED Throwies are popular contraptions made of a battery, an LED, and a magnet all taped together. This version does not include a magnet, although it could.
This project uses the same principle as Tool Using Animal's Penny Battery and Brenn 10's Penny and Nickel Battery. It uses pennies as electrodes and vinegar water as an acid you make a battery that will power the LED.
The video that this is based on can be found here.
If you like penny batteries, you're going to love the 500 lb. potato battery.
Step 1: Get your supplies!
- 6 pennies
- Section of matte board or porous cloth
- Sand paper
Step 2: Sand the pennies
Step 3: Mix a salty acidic solution
Step 4: Soak the fabric and start stacking
Place another penny facing the same direction on top of that.
This is one cell. Now, keep stacking to make your battery stronger.
Cap with one un-sanded penny.
Step 5: Finish it off
The LED should light up.
It's not very bright, but then again, it's running on only six cents!