Digital logic and design's lab 3

1. 2014
DLD lab 3
F.Ansari
N F C , F S D

2. Lab. No. 3
Objective:
To perform operation of OR gate according to OR gate truth table using IC
74lS32
Apparatus:
1. IC 74LS32
2. Wires
3. Cutter
4. AM 2001 Trainer
Integrated Circuit (IC):
AM Trainer 2001:

3. Truth Table of OR gate:
Truth table
Inputs Output
A B C = A + B
0 0 0
0 1 1
1 0 1
1 1 1
Procedure:
1. I took wires and cut them with the help of cutter.
2. I connect the IC on the breadboard.
3. I took a wire (white) and connect it at 7 pin and grounded it.
4. I connect two wires (Orange and blue) at pin 1 and 2 and connected it to switches S2
and S3.
5. Then I connected one end of brown wire with pin 3 to get output and other end with
LED (l4)
6. Then we give power supply through pin 14 with the help of another wire (green) which
is +5V
7. Now we started giving inputs through switches S2 and S3 respectively.
8. Firstly, we give 1 input to switch S2 and 0 input to switch S3, and as a result we get LED
(L4) turn on, which indicates that we get output 1.
9. Secondly, we give 0 input to switch S2 and 1 input to switch S3, and as a result we get
LED (L4) turn on, which indicates that we get output 1.
10. Thirdly, we give 1 input to switch S2 as well as 1 input to switch S3, and as a result we
get LED (L4) turn on, which indicates that we get output 1.
11. At the end, we give 0 input to switch S2 as well as 0 input to switch S3, and as a result
we get LED (L4) remains turn off, which indicates that we get output 0.
Result:
Hence I verified the truth table of OR gate using IC 74LS32.