A Key Stage 3 Lesson on Embedded Systems
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Last edit: 10 March 2026
This lesson moves students beyond desktop PCs to explore the fact that over 90% of modern computers are actually microcontrollers hidden in everyday devices. It breaks down the architecture of embedded systems using the IPSO (Input, Process, Storage, Output) model and introduces the Internet of Things (IoT).
Lesson Highlights include:
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No-Hardware Microcontroller Lab: A guided, plugged activity using the Wokwi online simulator where students can safely modify C++ code on a virtual ESP32 chip and instantly see the physical output changes (LEDs, LCDs, etc.) without needing a class set of physical boards.
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AI-Assisted IoT Comic Strip: A creative task where students safely use a structured AI prompt (Google Gemini) to generate a script for a futuristic, interconnected morning routine, which they then turn into a 4-panel smart home comic strip, identifying specific inputs and outputs.
You can access the full interactive lesson page here:
https://the.computing.cafe/cd41b6/lesson-3.2.5-embedded-systems
Hopefully, this saves some planning time for anyone teaching hardware or IoT this term! Let me know what you think.