SHS2 Physics · Semester 2 Week 13: Digital Electronics

Lesson notes

Learning Objectives

Indicator: 2.3.3.LI.3 - Describe and use the 7-segment display module.

By the end of the lesson, learners can:

Identify the seven segments (a to g) of a 7-segment display module and state whether each is a light-emitting diode (LED) or a liquid crystal display (LCD).
Construct a truth table showing which segments must be lit to display each decimal digit from 0 to 9.
Describe how the common anode and common cathode configurations differ and how current flows in each.
Use the truth table to determine the correct segment pattern for a given digit, working from a written prompt.
Develop a simple code sequence to display a short word or classroom name on a 7-segment display, working collaboratively in groups.

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Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Digital Electronics (3.3)
Content standard: 2.3.3.CS.1 - Demonstrate and understanding of the basics of Digital Electronics. 2.3.3.LO.1 Distinguishing between digital and analogue signals and how digital systems work.
Indicator: 2.3.3.LI.3 - Describe and use the 7-segment display module.
Suggested placement: Semester 2, Week 13 (Week 33 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. 135

Exemplars (from the NaCCA curriculum)

Talk for Learning and Project-Based Learning Describe how the 7-segment display module works using the truth table. Learners in groups, develop a code using the truth table to write their class names.
Assessment (2.3.3.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning.
Teaching and Learning Resources:
- ICT
- Use of simulation laboratories
- Use of science sets
- Use of oscilloscope
- Basic soldering