Wht Circuit Board Consits of:

The circuit board differs from company to company and the size of the circuit board will differs according to the make. But all the circuit board consits of the same parts to work.
The circuit board is mainly consists of many resistors to gather the charge and to supply to the others parts of the circuit board.
Then the circuit board has two types of resistors.
1. Some resistors gets the charge from the other parts of the circuit board and it will supply the voltage what it gets.
2. But some resistors will get the voltage from the other parts of the circuit board and it will supply only the capacity of the other parts which it is supplying.

The circuit board consists of many parts like Icu, power supply, transister, transformer and etc.

This circuit board only gets the voltage from the battery and supplies to the all part of the board with the help of connector.

The circuit board is made up of some hard plastic which cannot be burst or broken easily.