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Experiment No: 02 Experiment Name

The document describes an experiment to verify the operation of logic gates. Objectives are to examine AND, OR, NOT, NAND, NOR and XOR gates and derive their truth tables. Circuit diagrams and equipment are provided for building the gate circuits using an IC tester, ICs and multimeter. The procedure tests input-output configurations and records results in a data table. Software simulation of the gates is also shown. Questions about universal gates and constructing gates using a single type are answered by describing implementations with NAND and NOR gates only. The discussion reflects on learning gate operations and building logic circuits in software.

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Md Imam Hossain
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125 views4 pages

Experiment No: 02 Experiment Name

The document describes an experiment to verify the operation of logic gates. Objectives are to examine AND, OR, NOT, NAND, NOR and XOR gates and derive their truth tables. Circuit diagrams and equipment are provided for building the gate circuits using an IC tester, ICs and multimeter. The procedure tests input-output configurations and records results in a data table. Software simulation of the gates is also shown. Questions about universal gates and constructing gates using a single type are answered by describing implementations with NAND and NOR gates only. The discussion reflects on learning gate operations and building logic circuits in software.

Uploaded by

Md Imam Hossain
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Experiment No : 02

Experiment name
Verification of operation of different Logic Gate IC (AND, OR, NOT, NAND, NOR and XOR).

Objectives
ˆ To examine the operation of fundamental logic gates AND, OR, NOT, NAND, NOR, XOR and
determine their logical properties.

ˆ To derive the truth tables of logic gates and verify their logic equations.

Circuit Diagram

Figure 1: And,or,not gate

Figure 2: NAND, NOR, XOR


Experiment Equirpment
ˆ Digital Electronics Trainer Kit.

ˆ IC Tester.

ˆ IC (7404, 7408, 7432, 7400, 7402, 7486).

ˆ Multimeter.

Experiment Procedure
ˆ Place the components of the circuit shown in figure 1 on the trainer board and link the connections
correctly.
ˆ Use the data switches for input and LEDs for output.

ˆ Power on the trainer board.

ˆ Observe the outputs for different input configurations and fill in the data table.

ˆ Follow procedure 1 to 4 for circuit of figure 2.

ˆ Verify the truth tables and output equations obtained for different logic gates

Data Table

Table 1: Verification of truth table.


A B Y1 (AND ) Y2 (OR ) Y3 (NOT) Y1(NAND) Y2 (NOR) Y3 (XOR)
0 0 0 0 1 1 1 0
0 1 0 1 1 1 0 1
1 0 0 1 0 1 0 1
1 1 1 1 0 0 0 0

Software simulation
Figure 3: Simulation of different logic gates

Answer to the question


(a) Why NAND and NOR gates are called universal gate?
Ans:NAND and NOR gates are called universal gate because with the help of NAND and NOR
gate we can make all basic gates like AND, OR, AND gates.

3
(b) How you can construct NAND and NOR gates using the basic logic gates AND, OR,
NOT?
Ans:Construct NAND and NOR using AND,OR, NOT gate

NAND using AND & NOT NOR using NOT & OR

(c) Construct AND, OR and NOT gate by using NAND gate only. Also, construct these
gates by using NOR gate only.

NOT using NAND AND using NAND

OR using NOR
OR using NAND

Discussion
In this experiment we have learned the operation of fundamental logic gate and how to determine
the properties of them. We also experience the process of using logic gates on proteus and how it works.
Now we can build any kind of logic operation on proteus easily.

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