Deux oscillateurs, une porte XOR… et un motif lumineux fascinant

In this video, we'll explore a simple yet fascinating circuit: two slow oscillators built with NE555 timers, a CD4070 XOR gate… and three LEDs that reveal the relationship between two signals in real time. No need for an oscilloscope or complex equipment: everything is visualized right before your eyes. 👉 Project Objective Understand how an XOR gate compares two signals, not by adding them together, but by detecting their points of disagreement. The result? A dynamic light pattern that speeds up, slows down, and disappears according to the synchronization of the oscillators. 👉 What You Will Learn • How an NE555 works in astable mode • How to generate two slow square waves • How the CD4070 interprets these signals • Why the XOR output is a "difference detector" • How to visualize digital logic without an oscilloscope 👉 Why LEDs? Because it's immediate, intuitive, and accessible to everyone. This circuit transforms an abstract concept—logical comparison—into a clear and almost hypnotic visual experience. 👉 Perfect for: • Getting started in electronics • Understanding digital logic • Illustrating a lesson or workshop • Experimenting with NE555 timers • Exploring creativity in simple circuits If this project inspires you, feel free to recreate it, modify it, and share your variations. Your curiosity keeps this channel alive. 🔔 Subscribe 00:00 Introduction 01:27 Usefulness of the circuit 02:57 Schematics 07:40 Circuit testing 09:34 Conclusion Sources used: CD4070 technical documentation: https://www.alldatasheet.com/datashee... Script link: https://docs.google.com/document/d/1U... Google Drive folder linked to this video : https://drive.google.com/drive/folder... Royalty-free music used in this video: Heaven and Hell - Jeremy Blake    • Heaven and Hell   Francis Preve - Stranger Danger    • Stranger Danger   Angel Lover - Eyes of Glory    • Angel Lover - Eyes of Glory   Nico Staf - Fast and Run    • Nico Staf  | Fast and Run