SHS2 General Science · Semester 2 Week 8: Consumer Electronics

Lesson notes

Learning Objectives

Indicator: 2.3.3.LI.2 - Perform experiments using circuits containing LEDs and diodes to build phone chargers.

By the end of the lesson, learners can:

Identify the anode and cathode terminals of a diode and an LED and state the direction of conventional current flow in each.
Construct a simple rectifier circuit on a breadboard that converts alternating current (AC) to direct current (DC) using a diode and a capacitor.
Build a functional mobile phone charger circuit from a 5 V power source using a diode, capacitor, resistors, and an LED indicator.
Test their built charger circuit with a tester and explain the role each component plays in the circuit.
Troubleshoot a faulty charger circuit by checking connections, component orientation, and output voltage, and suggest corrections.

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Curriculum details

Strand: Vigour Behind Life (Strand 3)
Sub-strand: Consumer Electronics (3.3)
Content standard: 2.3.3.CS.1 - Demonstrate knowledge and recognition of selected electronic components and their uses in household electronic devices. 2.3.3.LO.1 Apply the knowledge of doping to explain the formation and behaviour of a P- N junction diode.
Indicator: 2.3.3.LI.2 - Perform experiments using circuits containing LEDs and diodes to build phone chargers.
Suggested placement: Semester 2, Week 8 (Week 28 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 80

Exemplars (from the NaCCA curriculum)

Project-based Learning: Put learners in mixed-ability groups while paying close attention to learners who need extra support for differentiated learning. Guide learners to build phone chargers using appropriate electronic components.
NOTE: In addition to phone chargers, any appropriate electronic device can be built
Teaching and Learning Resources:
- Simulations
- Charts of solid materials
- videos
- P-N junction diodes.
- LEDs
- Diodes
- Resistors
- Capacitors
- Connecting wires
- Circuit board
- Breadboards
- Plastic materials
- Tester
- Metal leads.
Assessment (2.3.3.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 4 Extended critical thinking and reasoning.