Building My First Sound-Reactive LED Matrix
My journey building a 16x16 LED matrix that dances to music using ESP32.
Build Timeline
Planning & Parts Ordering
Researched LED types, ordered WS2812B strips, ESP32, and power supply
Putting Parts Together
Connected up all the parts
What I’m Building
A mini concert for my desk. I’m building an 8x8 LED matrix that reacts to music in real-time. You can see the full project page here.
Why I Chose This Project
I’m a software dev, I want to learn hardware and I thought this would be a great place to start. Mainly because this project will teach me the basics and be quite simple to make something light up and achieve a small milestone.
The Build Journey
Week 1: Planning & Parts - End of 2025
Week 2: Putting Parts Together - Jan 2026
Questions I Had to Figure Out
What hardware is used in this LED matrix build?
The build uses WS2812B LED strips controlled by an ESP32 microcontroller, along with a power supply rated for the LED load.
How does the LED matrix react to sound?
The ESP32 reads audio input and drives LED patterns in real time based on the audio signal — making the matrix 'dance' to music.
Is this project suitable for beginners to hardware?
Yes — that's the point of it. This was a first hardware project chosen specifically because it's achievable for a software developer learning embedded systems, with a satisfying visible result early on.
Want more build logs & tech experiments?
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