Lesson Notes By Weeks and Term v4 - SHS 3
ELECTRONIC COMPONENTS AND CIRCUITS
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ELECTRONIC COMPONENTS AND CIRCUITS
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Subject: Applied Technology
Class: SHS 3
Term: 2nd Term
Week: 16
Grade code: 2.5.2.LI.5
Strand code: 4
Sub-strand code: 2
Content standard code: 2.5.2.CS.1
Indicator code: 2.5.2.LI.5
Theme: ELECTRICAL AND ELECTRONIC TECHNOLOGY
Subtheme: ELECTRONIC COMPONENTS AND CIRCUITS
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Welcome, students. Today, we are diving into the fascinating world of digital electronics. Think about your smartphone, the traffic lights in Accra or Kumasi, your digital watch, or even the computerised systems at the bank. What makes them "smart"? The answer lies in tiny electronic components called Logic Gates. They are the fundamental building blocks, the "brain cells," of all digital devices. By making simple 'yes' or 'no' decisions at incredible speeds, they perform all the complex tasks we rely on every day. Understanding logic gates is the first step to understanding how modern technology works.
A. What is a Logic Gate?
A logic gate is a basic building block of a digital circuit. Think of it as a tiny electronic switch or a "gatekeeper" with very strict rules. It has one or more inputs and only one output. It operates on binary logic, meaning the inputs and output can only be one of two states: HIGH (represented by the number 1, meaning "ON" or "True") LOW (represented by the number 0, meaning "OFF" or "False") The gate performs a specific logical function. Based on the combination of inputs (0s and 1s), it decides what the output should be (either a 0 or a 1).
These gates are built using transistors and are found inside Integrated Circuits (ICs) or "chips". B. Types of Logic Gates
We will study two main categories: Basic Gates and Universal Gates. i. Basic Logic Gates