Digital Electronics · SHS2 Physics

Lesson notes

Learning Objectives

Indicator: 2.3.3.LI.1 - Distinguish between analogue and digital signals and describe their functions.

By the end of the lesson, learners can:

Define analogue and digital signals in their own words, giving at least one distinguishing feature for each.
Draw a waveform for an analogue signal and a waveform for a digital signal, correctly labelling the axes (time and amplitude).
Identify whether a given signal or device is analogue or digital, and justify their answer with a reason.
Describe the function of analogue signals and digital signals in everyday electronic systems, giving at least one practical example of each.
Compare analogue and digital signals by stating at least two advantages of digital signals over analogue signals, using correct terminology such as noise, discrete, and continuous.

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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.2 - Demonstrate the understanding of logic gates and describe their output in a digital system. 2.3.3.LO.2 Distinguish between the working operations of analogue and digital systems as well as design and build a decision-making circuit.
Indicator: 2.3.3.LI.1 - Distinguish between analogue and digital signals and describe their functions.
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. 136

Exemplars (from the NaCCA curriculum)

Problem Based Learning: Learners describe through differentiation, draw and analyse analogue and digital signals.
Encourage the appreciation and valuing of the skills and abilities of individuals from diverse backgrounds, including gender, race, ethnicity, socioeconomic status, and disabilities.
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.
Teaching and Learning Resources:
- Laptop/Computer
- Projector
- Internet
- Simulation lab software
- Science kit set