To verify De-Morgan's theorem






  1. Click on the components button to place the component.
  2. Make connections as per the circuit diagram and pin diagrams of ICs.
    3. Fig. 1 Circuit diagram
    Fig. 2 Pin diagram of IC 7432
    Fig. 3 Pin diagram of IC 7404
  3. Click on 'Check Connections' button. If connections are right, click on ‘OK’, then Simulation will become active.
  4. Provide the input by clicking toggle switches A and B.
  5. Fill the observed values in the Truth Table.
  6. Verify Truth Table by clicking on 'Check' button, if outputs are correct then click on OK.
  7. Click on the 'Result' button provided below the table.

Theorem 1

Truth table

A B (A+B)'
0 0
0 1
1 0
1 1
A B A'.B'
0 0
0 1
1 0
1 1