NAND as Universal Gate

By combination of  NAND Gate we can produce AND, OR, NOT (basic logic gates) so we call NAND as Universal Gate. It is easiest to produce and widely available. This is also true for NOR Gate. But we prefer NAND gate over NOR because of low logic effort and delay.

In this project we will see how this circuit function. Our aim of this experiment is to study and verify the truth table of logic gates. For input level (High and Low) We have used 2 way switch and to test its output, LED is used.

Project on NAND as Universal Gate. CBSE Class 12 Model

In this project we will use IC (Integrated Circuit). IC CD4011 contains quad NAND Gates. This type of CMOS IC also have buffered outputs which improve transfer characteristics by providing very high gain. Total six Gate is needed in this project  so I have used two IC. First IC is used for NOT, AND Gate and second for OR Gate. Two gate of IC are left idle.

Components :-

IC CD4011 = 2 Pcs

Resistance 470 ohms = 3 Pcs

LED = 3 Pcs

Mini SPDT Switch = 5 Pcs

Rocker Switch = 1Pc

9V Battery with Snap

IC Varo board.

Project on NAND as Universal Gate. CBSE Class 12 Model

Procedure: 

  • Check the components for their working.

  •  Insert the appropriate IC correctly into the IC base, Breadboard or Zero PCB 

  • Make connections as shown in the circuit diagram.

  • Verify the Truth Table and observe the outputs..

   Circuit Diagram of NAND as Universal Gate

Advantage: NAND gate is cheaper and widely available. We can use up spare gates of bought NAND IC  for different purpose. It helps in reducing the number of interconnections and the total number of gates in digital systems.