Page 38 - Computer_Science_F5

Chapter One: Computer architecture
(b) Light off

FOR ONLINE READING ONLY

Figure 1.27: Putting Light off

Question:

1. What did you observe during your exploration?
2. Describe your experience when preparing a truth table, sketching a common
circuit diagram, and testing the circuit in a simulator.

Activity 1.11:
A
The relationship between Boolean
operation and logical gates

Two electrical switches, a bulb and Y
a battery are connected as shown in
Figure 1.28. As a technical expert, you
are required to establish the truth table
to reflect the circuit operations that
control switches A and B, which will Figure 1.28: Electric circuit with two switches
light up the bulb, and then propose (d) Simulate this circuit by using a
the logic gate for the circuit. The Logisim simulator
following conditions will guide you:
(a) What happens when both switches
are OFF? ; Application of logic gates
(b) What happens when only one switch Logic gates is the fundamental backbone
is ON (either A or B)? ; and of the digital electronic industry.
(c) What happens when both switches The design and operation of digital
are ON? electronic devices are based on digital
logic circuits. These devices make use

29
Student’s Book Form Five

Computer Science Form 5.indd 29 23/07/2024 12:32