Lesson Notes By Weeks and Term v4 - SHS 1

Lesson Video

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Performance objectives

• Define and differentiate between digital and analogue systems.
• Identify components of block and schematic diagrams.
• Create a block diagram for a simple system.
• Interpret information from schematic diagrams.

Lesson summary

Imagine you want to build a house in your hometown. Would you just start buying cement blocks and putting them together? No! You would first need a plan, an architectural drawing, to guide you. In the world of robotics and electronics, our "plans" are diagrams. These diagrams help us understand, design, build, and repair electronic systems, from a simple rechargeable lamp that helps during "dumsor" (power outages) to the complex robots we see in industries. This lesson introduces the two most important types of diagrams: Block Diagrams and Schematic Diagrams. We will learn how to read, understand, and even create these essential "maps" for electronic journeys.

Lesson notes

This is the core content you will explain to the learners. What is an Electronic System?

An electronic system is a collection of electronic parts (components) that work together to perform a specific function. Every electronic system has three main parts: Input: Receives a signal or energy from the outside world (e.g., pressing a switch, speaking into a microphone). Process: Manipulates or changes the signal (e.g., an amplifier making a sound louder). Output: Delivers the final result (e.g., a speaker producing sound, a light turning on).

A. Block Diagrams: The Big Picture

A block diagram is a high-level, simplified drawing of an electronic system. It's like looking at a map of Ghana showing only the major cities and the main roads connecting them. It doesn't show the small streets or individual houses. Purpose: To show the main functional parts of a system and how they are connected. It helps us understand the overall operation without getting lost in the details. How it works: Each "block" represents a major part or process of the system (e.g., "Power Supply," "Amplifier," "Motor Driver"). Arrows show the direction of signal flow or connection between the blocks.

Evaluation guide

• Properly label and explain block and schematic diagram representations of
• electronic systems.
• Project-Based Learning: Introduce learners to schematic and block notations. Develop
• block and schematic representations of given circuit narratives. Learners then pick other