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: 15
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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This lesson introduces the fundamental building blocks of all digital devices: logic gates. Every smartphone we use for WhatsApp, every computer we use for schoolwork, and even the traffic lights in cities like Accra and Kumasi, operate based on millions of tiny electronic switches making simple "yes/no" decisions. These decision-making circuits are called logic gates. Understanding them is the first step to understanding how all modern digital electronics work. By learning about these components, we gain insight into the "brain" of the technology that shapes our world.
Teacher's Note on Pedagogy: *This lesson is best delivered using a mix of direct instruction, questioning, and collaborative activities. Use the "think-pair-share" method to allow learners to discuss concepts before sharing with the class. When discussing truth tables, draw them on the board and fill them out step-by-step with learner participation. Remember the NaCCA guideline: Ensure all learners, including girls and those with physical challenges, are actively involved in discussions and group activities.* A. What is a Logic Gate?
A logic gate is a basic electronic circuit that performs a logical operation on one or more binary inputs to produce a single binary output.
Let's break that down: Binary: This means something that can only have two states. In electronics, we represent these states as: 1 (HIGH, ON, TRUE, +5V) 0 (LOW, OFF, FALSE, 0V) Inputs: These are the signals coming into the gate. Output: This is the single signal that comes out of the gate after it makes its "decision". Logical Operation: This is the specific rule the gate follows to decide what the output should be based on the inputs.
Analogy: Think of a security guard at a gate. The guard has a rule. For example, the rule might be: "Let the person in ONLY IF they have a student ID card AND they are wearing the school uniform." This is a logical decision, similar to what an AND gate does. B. The Basic Logic Gates