Digital Electronics · SHS2 Physics

Lesson notes

Learning Objectives

Indicator: 2.3.3.LI.1 - Describe analogue and digital signals.

By the end of the lesson, learners can:

Define analogue and digital signals in their own words, giving at least two distinguishing features of each.
Sketch and interpret graphical displays of analogue and digital signals as they appear on an oscilloscope.
Classify common everyday signals (e.g. human voice, thermometer reading, computer data) as either analogue or digital, justifying their choice with a reason.
State one advantage and one disadvantage of each type of signal in a practical context.
Explain why conversion between analogue and digital systems is necessary in modern electronics.

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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.1 - Describe analogue and digital signals.
Suggested placement: Semester 2, Week 11 (Week 31 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)

Experiential Learning and Talk for Learning: Describe and explain analogue and digital graphical displays using an oscilloscope and their advantages and disadvantages. Explain the need the convert between analogue and digital systems.
Explore contributions of vulnerable groups in the class.
Assessment (2.3.3.AS.1). 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