Ministry of Science and Technology
Department of Advanced Science and Technology
University of Technology
(Yatanarpon Cyber City)
Faculty of Electronic Engineering
EcE-21021 Digital Electronics LAB I
Name ………………………………
Roll No. …………………………….
Date
…………………………….
(2022-2023) Academic Year
Experiment-I
LOGIC GATES
1.1 Objectives
To study basic gates (AND, OR, NOT) and universal gates (NAND, NOR) and verify
their truth tables.
1.2 Required Equipment
- Digital ICs
- Resistor 330Ω and 470Ω
-Variable DC power supply
- Jumper wires
- LED
-Bread Board
1.3 Pin Diagram of 555 Timer IC
7400(NAND)
7404(NOT)
7432(OR)
7402(NOR)
7408(AND)
7486(XOR)
1.4 Construct the circuit diagrams for digital ICs and fill the truth tables.
I. NOT Gate
Procedure
Set NOT gate on the breadboard. Let pin 1 is an input and pin 2 as a output. Join
the output pin 2 with resistor and LED. Pin 7 is connected to ground. Give a 5V-9V supply
to pin 14. Jumper wires are used to connect all above connections.
VCC
5V
1
R1
2
470Ω
LED1
74LS04N
5V
Truth Table for NOT Gate
Input
Output
0
1
II.
AND Gate
Procedure
Set AND gate on the breadboard. Let pin 1 and 2 set as inputs and pin 3 as a output.
Join the output pin 3 with resistor and LED. Pin 7 is connected to ground. Give a 5V-9V
supply to pin 14. Jumper wires are used to connect all above connections.
1
3
2
74LS08N
R1
330Ω
5V
LED1
Truth Table for AND Gate
Input
Output
0
0
0
1
1
0
1
1
III.
OR Gate
Procedure
Set OR gate on the breadboard. Let pin 1 and 2 set as inputs and pin 3 as a output. Join
the output pin 3 with resistor and LED. Pin 7 is connected to ground. Give a 5V-9V supply to
pin 14. Jumper wires are used to connect all above connections.
1
3
2
74LS32D
R1
330Ω
5V
LED1
Truth Table for OR Gate
Input
Output
0
0
0
1
1
0
1
1