Lesson Notes By Weeks and Term - Junior Secondary 3

TERM – 3^RD 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

1. Identify the components of electronic devices
2. 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

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:

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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
8. 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
9. Sensor: They converts physical or environmental data into electrical signals, facilitating functions like temperature sensing, motion detection, etc.
10. LED (Light Emitting Diode): Semiconductor device that emits light when current flows through it, used for display indicators and lighting.
11. Microphone and Speaker: They convert sound waves into electrical signals (microphone) and vice versa (speaker) in audio devices.
12. Battery: A battery stores electrical energy for portable devices, providing a power source.
13. Switch: It's controls the flow of electricity by opening or closing a circuit.
14. Connector and Cables: Facilitate the connection and communication between different components within a device.

EVALUATION: 1. Identify 10 components of electronic devices

2. Describe the uses of each components mentioned in 1 above.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively