Polyphonic Synthesiser with Envelope Control
Polyphonic Synthesiser Kit with ADSR Control — Arduino Mega Project
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Step into the world of digital audio synthesis with this complete polyphonic synthesizer kit. Using an Arduino Mega and MCP4725 DAC, you’ll generate multi-voice sound that rivals vintage analog synths. Four rotary encoders let you sculpt the envelope in real time — attack, decay, sustain, release — while the OLED display shows exact parameter values. Whether you’re an electronic music producer or an engineering student exploring audio DSP, this kit turns theory into a tangible, playable instrument.
What You'll Build
A fully functional polyphonic synthesiser capable of rich, layered tones. The Arduino Mega drives a high-resolution DAC to output multiple voices simultaneously, with hands-on control via rotary encoders. Connect the PAM8403 amplifier and 3W speaker to hear your creations immediately, then tweak the ADSR curve to shape pad sweeps, percussive plucks, or evolving leads.
What You'll Learn
- Polyphonic audio generation using Arduino Mega and MCP4725 DAC with R2R ladder principles
- Real-time implementation of ADSR envelope control for expressive sound dynamics
- Interfacing multiple rotary encoders and an OLED screen for precise parameter adjustment
- Designing a compact audio output stage with the PAM8403 amplifier and speaker
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| MCP4725 DAC | 1 |
| PAM8403 Amp | 1 |
| 3W 8Ω Speaker | 1 |
| Rotary Encoder | 4 |
| 0.96in OLED | 1 |
| 10kΩ Resistors | 20 |
| 20kΩ Resistors | 10 |
| 1kΩ Resistors | 10 |
| 100nF Caps | 15 |
| 10µF Caps | 5 |
| PCB Prototype Board | 2 |
| 830-pt Breadboard | 1 |
| 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
Designed for advanced makers, this kit suits B.Tech (ECE/EEE) and M.Tech students building digital audio final-year projects, as well as Smart India Hackathon participants creating music-tech or assistive audio devices. Hobbyists from IITs, NITs, VIT, and BITS will find it a rewarding deep dive into synthesis and MCU-based DSP.
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?
Scan the QR code to chat with the AI companion, which walks you through this specific synthesiser build step by step. WhatsApp support is also available for tricky questions.
Can I modify the firmware to create custom sounds?
Absolutely. The Arduino Mega sketch is open and well-commented; you can add oscillators, effects, or adjust waveforms. Our AI companion can help you extend the project with code snippets.
Does the kit include a power supply?
The Arduino Mega is powered via USB, so you only need a standard 5V adapter or power bank (not included). All audio circuitry runs from the Arduino's regulated output.
Is this suitable for a Smart India Hackathon project?
Yes, many participants use this synthesiser as a core for health-monitoring sounds, musical therapy devices, or novel interfaces. The pre-tested build and AI guidance help you meet tight hackathon deadlines.
Arduino Mega R2R DAC generates multi-voice audio. Rotary encoders control ADSR parameters. PAM8403 output.
What's in this kit
- Arduino Mega 2560
- MCP4725 DAC
- PAM8403 Amp
- 3W 8Ω Speaker
- Rotary Encoder x4
- 0.96in OLED
- 10kΩ Resistors x20
- 20kΩ Resistors x10
- 1kΩ Resistors x10
- 100nF Caps x15
- 10µF Caps x5
- PCB Prototype Board x2
- 830-pt Breadboard
- 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