DiscoJar is a sound reactive DIY LED lamp, using an Ikea jar and 288 APA102 LEDs.
It does real-time spectrum analysis of the audio input and shows a colorful view of it.
This instructable will guide you how to build your own DiscoJar! It provides instructions and the full source code for the micro controller.
A Teensy 3.2 micro controller is used to control the LEDs and to analyze and display the spectrum of incoming music using various visual effects. The lamp features a WiFi remote control and it can also be used as a mood lamp. It can e.g. show plasma effects or you can program your own custom patterns.
Building the project costs around 100 Euros, the LEDs are the most expensive part.
The project is easy to build, all you need are some soldering skills to solder the APA strips together.