AIM OF THE EXPERIMENT:
After conducting this experiment students will understand
7) the meaning of logic gates,
8) power loss in digital circuits,
9) probable application of it.
MATERIALS REQUIRED:
Diodes; Transistors
Bread-board; Jumper wires
Multimeters; Power supply (5 V DC)


THEORY:
Logic gatesare the elementary building blocks of any digital system.These are electronic circuit having one or more than
one input and only one output and responds only to HIGH voltages (called 1s) or LOW (ground) voltages (called 0s). The
relationship between the input and the output is based on a certain logic. Based on this, logic gates are named as OR
gate, AND gate, NOT gate, NOR gate and NAND gate. First three are basic gates whereas last two are universal gates.
AND gate: The AND gate is sometimes called the 􀍞all or nothing gate􀍟. When all inputs are HIGH then output is HIGH

otherwise output is LOW.
OR gate: The OR gate is sometimes called the 􀍞any or all gate􀍟. When all inputs are LOW then output is LOW otherwise
output is HIGH.