MIDI-Reactive Light Organ Kit with Arduino Uno + LED
MIDI-Reactive Light Organ Kit with Arduino Uno — Visualize Live Music on an LED Strip
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Transform any MIDI-capable instrument or DAW into a stunning light show. This advanced kit processes MIDI notes in real time, lighting up a 60-LED WS2812B strip with colours mapped to pitch and brightness that follows velocity — creating an audio-visual instrument without a single line of code written from scratch.
What You'll Build
A standalone MIDI-reactive light organ that connects directly to a MIDI keyboard, synthesizer, or laptop via MIDI DIN. Each note triggers a specific LED segment — low notes at left, high at right — with warmer colours for lower pitches and cooler hues for higher ones. Velocity controls brightness, making every performance dynamic and expressive. The finished unit sits in a custom enclosure, ready for live gigs or installations.
What You'll Learn
- Decoding MIDI protocol bytes and extracting note-on/off messages
- Interfacing an Arduino Uno with a 6N138 optocoupler for noise-free MIDI input
- Addressable LED strip control using the FastLED library for per-pixel colour and brightness
- Mapping musical pitch and velocity to visual parameters in real-time embedded code
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| WS2812B 60-LED Strip | 1 |
| MIDI DIN Socket | 1 |
| 6N138 Optocoupler | 1 |
| 470Ω Resistors | 5 |
| 220Ω Resistors | 5 |
| 1000µF 6.3V Capacitors | 2 |
| 5V 3A Power Supply Unit | 1 |
| PCB Prototype Board | 2 |
| Enclosure Box | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Ideal for music technology enthusiasts, B.Tech ECE/EEE students exploring embedded systems, and composers who want a tangible light organ for live performances. The advanced circuitry and coding make it perfect for final-year projects, Smart India Hackathon prototypes, and ATL Tinkering Lab mentoring sessions that challenge advanced learners in India.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
The AI companion walks you through each step with interactive troubleshooting. You can also send a photo over WhatsApp for personal guidance from our support team.
Does this kit require soldering?
Yes, you'll solder components onto two prototype PCBs. The kit includes a soldering iron and solder wire. The AI companion provides step-by-step soldering guidance with clear photo references.
Can I connect it to a USB-only MIDI controller?
The kit uses a DIN socket for standard MIDI; for USB MIDI, you'll need a USB host shield or a laptop as a bridge. The Arduino code reads standard MIDI from the optocoupler input.
Can I customise the LED colours and mapping?
Absolutely. The code is open-source, and the AI companion can help you tweak colour palettes, segment mapping, and velocity curves to suit your style.
MIDI notes from USB trigger WS2812B strip segments mapped to pitch with velocity-controlled brightness.
What's in this kit
- Arduino Uno R3
- WS2812B 60-LED Strip
- MIDI DIN Socket
- 6N138 Optocoupler
- 470Ω Resistors x5
- 220Ω Resistors x5
- 1000µF 6.3V Caps x2
- 5V 3A PSU
- PCB Prototype Board x2
- Enclosure Box
- Soldering Iron
- Solder Wire
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items