How to make a penny battery is a simple science project to understand the generation of electricity is one of the easiest to make and the raw material is available.
This simple school project uses two different types of metal which is stacked one on top of other and use some salt water or lemon drops to make a voltaic pile.
These kind of simple batteries convert chemical energy to electrical energy and generate small volts electricity. The higher the stack then higher is the voltage produced which is enough to light up one small LED of 1.5v.
Zinc and copper are the materials generally used for this school project. Zinc nails and copper wire can also do the trick.
Usually pennies are used. They are first sanded with sandpaper on one side so that zinc can come to surface and the other side is usually left free. Copper side is faced down and zinc side faces up and in between them a tissue paper soaked in salt water solution or lemon juice is used. The stacking is done the same way by placing copper side of the penny again on the zinc side with tissue paper soaked in sour solution to complete this science project.
Vinegar can also be used to soak tissue paper to make the pile. The stack can be as big as 12 penny pieces to generate minimum voltage to give electricity to light up LED.
It usually takes 7 to 8 hours for electrons to start flowing for science project to work. The tissue paper should not dry in the process and is kept wet with the sour solution.
The stack can be made higher once the voltage is checked from the multimeter.
There is another variation to this whole project as in India the pennies are not easily available we can use zinc nails and copper wire to compete the project.
This simple project is based on the same principle and once assembled is good to light up LED of 1.5v.
To make this interesting school project visit www.projectsforschool.com to buy the kit for photon flower.