TERM – 3RD TERM
WEEK FOUR
Class: Junior Secondary School 3
Age: 14 years
Duration: 40 minutes of 5 periods each
Date:
Subject: BASIC TECHNOLOGY
Topic: BASIC ELECTRONICS II
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
- Identify the components of electronic devices
- Discuss the uses of electronic devices
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,
demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
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PRESENTATION
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TEACHER’S ACTIVITY
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STUDENT’S
ACTIVITY
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STEP 1
INTRODUCTION
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The teacher Identify the components of electronic devices
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Students pay
attention
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STEP 2
EXPLANATION
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Teacher discusses the uses of all the components of electronic devices identified
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Students pay
attention and
participate
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STEP 3
NOTE TAKING
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The teacher writes a summarized
note on the board
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The students
copy the note in
their books
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NOTE
BASIC ELECTRONICS II
Components of Electronic Devices
Electronic devices consist of various components that work together to perform specific functions. Here are some key components and a brief discussion of their roles:
- Microprocessor/Microcontroller: A microprocessor and a microcontroller are both integrated circuits that serve as the central processing unit (CPU) of a computer or an embedded system. While they share some similarities, they are designed for different applications.
- Memory (RAM and ROM): RAM (Random Access Memory) provides temporary storage for data during operation, while ROM (Read-Only Memory) stores permanent data, including firmware and system instructions.
- Transistor: A transistor is a semiconductor device that can amplify or switch electronic signals. It is a fundamental building block in modern electronics and serves various purposes in electronic circuits. Transistors are essential for controlling the flow of electrical current and manipulating signals in electronic devices.
- Resistor: A resistor is an electronic component that restricts or limits the flow of electric current in a circuit. It is a passive two-terminal device with the primary function of controlling the amount of current that can pass through it.
- Capacitor: A capacitor is an electronic component that stores electrical energy in an electric field. It consists of two conductive plates separated by an insulating material known as a dielectric. The capacitance of a capacitor, measured in farads (F), represents its ability to store charge.
- Diode: A diode is a semiconductor device that allows current to flow in one direction only. It typically consists of a semiconductor material, often with two layers – one doped to have excess electrons (N-type) and the other doped to have a deficit of electrons (P-type). The junction between these layers forms a diode.
- Integrated Circuit (IC): An integrated circuit (IC), also known as a microchip or chip, is a compact arrangement of transistors, resistors, capacitors, and other electronic components on a single semiconductor substrate or chip. The integration of these components onto a single chip allows for the creation of complex electronic circuits in a small and efficient form
- Inductor: An inductor is an electronic component that stores electrical energy in a magnetic field when an electric current flows through it. It typically consists of a coil of wire wound around a core, often made of ferromagnetic material
- Sensor: They converts physical or environmental data into electrical signals, facilitating functions like temperature sensing, motion detection, etc.
- LED (Light Emitting Diode): Semiconductor device that emits light when current flows through it, used for display indicators and lighting.
- Microphone and Speaker: They convert sound waves into electrical signals (microphone) and vice versa (speaker) in audio devices.
- Battery: A battery stores electrical energy for portable devices, providing a power source.
- Switch: It's controls the flow of electricity by opening or closing a circuit.
- Connector and Cables: Facilitate the connection and communication between different components within a device.
EVALUATION: 1. Identify 10 components of electronic devices
- Describe the uses of each components mentioned in 1 above.
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively
