**Raspberry Pi Pico Tutorial #6 |🚦 Aggregation vs Composition in OOP with using RGB LEDs | **
In this sixth episode of our *Object-Oriented MicroPython on Raspberry Pi Pico* series, we dive deeper into the principles of **association in object-oriented programming**, focusing on **aggregation and composition**.
We introduce an *RGB LED* and build a `Pixel` class, then expand our class hierarchy with a new *CompositeLights* class. Using subclasses like `TrafficLight` and `Pixel`, we demonstrate how objects can form *whole–part relationships* in different ways, and how to distinguish *aggregation* from *composition* in practice.
This tutorial connects theory with real-world MicroPython coding, giving you both a conceptual understanding of OOP design and a practical application on the Raspberry Pi Pico.
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🎯 *What You’ll Learn in This Video:*
What association means in OOP
The difference between aggregation and composition
How to create a `Pixel` class for RGB LEDs
Designing a `CompositeLights` hierarchy with subclasses (`TrafficLight`, `Pixel`)
Whole–part relationships in MicroPython classes
Applying OOP theory to embedded systems projects
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🧰 *Tools & Components Used:*
Raspberry Pi Pico (or Pico W)
RGB LED (common cathode or common anode)
Resistors & jumper wires
Breadboard
MicroPython firmware + Thonny IDE
📁 *Resources & Code:*
👉 \[GitHub code link] https://github.com/jitsengupta/PicoLi...
👉 \[Wokwi Simulation Link] https://wokwi.com/projects/4404474417...
👉 \[Full playlist link] • A Tutorial series on the Raspberry Pi Pico...
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*📌 Chapters:*
00:00 – Introduction
00:30 -- The RGB LED in action
02:57 – Association, Aggregation and Composition Explained
04:15 – Building the `CompositeLights` Class Hierarchy
04:50 – Subclassing with `TrafficLight` and `Pixel`
06:08 – Whole–Part Relationships - aggregation and composition
11:04 – Coding the RGB LED using the Pixel class
15:00 – Wrap-up & Next Steps
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📣 *Want to strengthen your Python and MicroPython OOP skills? Don’t forget to LIKE 👍, SUBSCRIBE 🔔, and COMMENT 💬 to share your own aggregation vs composition examples!*
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