. VERIFICATION OF DE MORGAN’S THEOREMS AIM: To verify De Morgan’s first and second theorems. COMPONENTS REQUIRED : Power Supply ( – 5V), IC , , , , and , Digital IC trainer kit, connecting wires. FORMULA De Morgan’s first theorem A A B De Morgan’s second theorem A B CIRCUIT DIAGRAM: De Morgan’s first theorem A+B A+B A .
B De Morgan’s second theorem AB AB A+B PROCEDURE: i) Verification of De Morgan’s first theorem • The connections are made for LHS A of the theorem as shown in the circuit diagram using appropriate ICs. • The output is noted and tabulated for all combinations of logical inputs of the truth table. • The same procedure is repeated for RHS A B of the theorem. • From the truth table, it can be shown that A A B .
. XII- - ) XII- - ) - - - - PRACTICAL ii) Verification of De Morgan’s second theorem • The connections are made for LHS A B of the theorem as shown in the circuit diagram using appropriate ICs. • The output is noted and tabulated for all combinations of logical inputs of the truth table. • The same procedure is repeated for RHS A of the theorem.
• From the truth table, it can be shown that A B OBSERVATION De-Morgan’s first theorem Truth Table A B De-Morgan’s second theorem Truth Table A B RESULT De Morgan’s first and second theorems are verified. Note The pin diagram for IC , IC and IC can be taken from previous experiment Precautions V CC and ground pins must not be interchanged while making connections. Otherwise the chip will be damaged. For the ICs used, 5V is applied to the pin while the pin is connected to the ground.
XII- - ) XII- - ) - - - - PRACTICAL SUGGESTED QUESTIONS FOR THE PRACTICAL EXAMINATION . Determine the resistance of a given wire using metre bridge. Also find