Lesson Plan

• Identify common electronic components used in control systems and explain their functions.
• Interpret and draw standard IEC schematic symbols for these components.
• Apply symbol construction rules to produce clear circuit diagrams.
• Analyse a simple temperature‑controlled fan circuit and describe how the components interact.

• Projector or interactive whiteboard
• PowerPoint/Google Slides with component images and symbols
• Handout worksheet for symbol‑matching activity
• Breadboard and sample components (resistor, LED, relay, sensor, etc.)
• Multimeter
• Laptop with circuit design software (e.g., Fritzing or Tinkercad)
• Whiteboard markers

Begin with the question “What tells a machine when to turn on?” to connect to students’ prior knowledge of basic voltage and current concepts. Review that they already understand simple circuits. Explain that today they will learn to recognise key components, their standard schematic symbols, and will be able to sketch a simple control circuit by the end of the lesson.

1. Do‑now (5') – Matching worksheet: component names ↔ functions.
2. Mini‑lecture (10') – Overview of common components and IEC symbols using the projector.
3. Guided practice (12') – Teacher draws symbols on the whiteboard; students copy them in notebooks.
4. Hands‑on activity (15') – Small groups build a temperature‑controlled fan circuit on a breadboard and label each part.
5. Diagramming task (10') – Groups convert their breadboard circuit into a schematic using the provided symbol key.
6. Check for understanding (5') – Quick exit‑ticket quiz on identifying symbols and component roles.

Recap that accurate symbols are essential for clear communication and troubleshooting in control systems. Collect the schematics as an exit ticket, and assign homework: each student creates a schematic for a different control scenario (e.g., a light‑activated switch) to reinforce symbol use.