| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Information Technology IT |
| Lesson Topic: Identify sensor types (light, temperature, pressure, humidity, gas) |
Learning Objective/s:
- Describe the physical quantities measured by light, temperature, pressure, humidity, and gas sensors.
- Explain how sensors convert a physical variable into an electrical signal and the role of signal conditioning.
- Compare analog and digital output types and select appropriate sensors for a given monitoring and control application.
|
Materials Needed:
- Projector or interactive whiteboard
- Slide deck with sensor tables and diagrams
- Handout worksheet for sensor‑matching activity
- Sample sensor datasheets (photodiode, thermocouple, pressure sensor)
- PLC or microcontroller demo kit (optional)
- Whiteboard and markers
|
Introduction:
Begin with a quick question: “What devices in our daily life tell a computer about light or temperature?” Students recall previous work on input devices. Explain that today they will identify key sensor types and understand how these sensors generate signals, aiming to list their characteristics and choose suitable ones for control systems.
|
Lesson Structure:
- Do‑now (5’) – Students list everyday sensors they have encountered and share examples.
- Mini‑lecture (10’) – Define a sensor, present the conversion chain, and introduce the five sensor types with a slide.
- Interactive table activity (12’) – In pairs, complete a worksheet matching each sensor type to its measured quantity, typical output, and common application.
- Demonstration (8’) – Show a light sensor and a temperature sensor connected to a microcontroller; display real‑time outputs.
- Application discussion (10’) – Groups analyse the greenhouse example, decide on analog vs. digital outputs for a PLC, and review selection criteria.
- Check for understanding (5’) – Quick quiz/exit ticket with three questions on sensor types and signal conversion.
|
Conclusion:
Recap that each sensor detects a specific property and converts it into an analog or digital signal that must be conditioned before use. Students complete an exit ticket naming one advantage of digital outputs. For homework, they research a sensor not covered in class and prepare a brief description of its application.
|