28-11-2012, 02:23 PM
Solar Cell
Solar Cell.pdf (Size: 410 KB / Downloads: 34)
The circuit illustrated below is used as Solar Cell. You can get plate from your old faulty solar calculator.
Carefully dissemble plate with out tearing its 2 wire. Connect both wire to a LED through a switch. When Solar
Plate is kept in sunlight and switched ON you will see LED glows .
Please make sure for the correct polarity of LED.
Theory :
When energy is added to pure silicon, for example in the form of heat, it can cause a few electrons to break
free of their bonds and leave their atoms. A hole is left behind in each case. These electrons then wander
randomly around the crystalline lattice looking for another hole to fall into. These electrons are called free
carriers, and can carry electrical current