Binaural Beat Therapy Timer Kit with ESP32 + LED
Build a Precision 40Hz Gamma Entrainment Therapy Device with ESP32
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Replace generic white-noise apps with a hardware-accurate 40Hz gamma entrainment timer you build and calibrate yourself. This kit gives you every component to generate precisely frequency-matched binaural beats through dual speakers, letting you run timed sessions for deep focus, study, or relaxation without relying on a phone’s unpredictable DAC. The ESP32 pumps I2S signals to a quad-channel MCP4728 converter, while a rotary encoder and OLED let you dial in session length and volume before the beat starts pulsing.
What You'll Build
You’ll assemble and solder a standalone binaural beat player housed in an enclosure box, with two 3W speakers playing slightly different tones to create a 40Hz perceptual beat. The OLED shows remaining session time, and the PAM8403 amp drives clean stereo output. When the timer runs out, the beat fades — a tidy, repeatable audio therapy device that works without any app or subscription.
What You'll Learn
- Program the ESP32’s I2S peripheral to feed stereo audio data to the MCP4728 quad DAC
- Generate precise frequency pairs (e.g., 440 Hz left, 480 Hz right) for a rock-solid 40 Hz binaural beat
- Integrate a rotary encoder and 0.96-inch OLED to build a countdown timer with real-time user input
- Amplify the DAC output with a PAM8403 stereo amp and match impedance to 3W 8Ω speakers
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| MCP4728 Quad DAC | 1 |
| PAM8403 Stereo Amp | 1 |
| 3W 8Ω Speaker | 2 |
| Rotary Encoder | 1 |
| 0.96in OLED | 1 |
| 10kΩ Resistors | 5 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| Enclosure Box | 1 |
| 5V 2A PSU | 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
B.Tech ECE and EEE students who want a tangible DSP project for their coursework or hackathon (Smart India Hackathon bio-enhancement tracks, IIT/NIT/VIT submissions). Cognitive science enthusiasts and DIY neurohackers seeking a reproducible 40Hz entrainment rig they can trust. CBSE Class 12 students pursuing investigatory projects in applied physics or biotech will find the build process and documentation ready to cite.
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 covers wiring, code upload, and calibration. If that doesn’t resolve it, message us on WhatsApp — our team has built this kit dozens of times and responds within hours.
Can I change the binaural beat frequency after building?
Yes, the ESP32 firmware is open and easily modified. Adjust the two I2S tone variables in the source code to target alpha (10 Hz), theta, or any other entrainment band.
Do I need an oscilloscope to verify the output?
No. You can test the beat perceptually with headphones or confirm the separate frequencies using a multimeter with frequency mode on the DAC outputs. The code guarantees a 40 Hz difference.
Is soldering absolutely required?
Yes. All components mount on the prototype board, and you’ll need to solder the DAC, amp, encoder, and OLED pins. This is an advanced kit, and soldering is a core part of the skill-building.
ESP32 generates precise 40Hz binaural beat for gamma entrainment with session timer and volume control.
What's in this kit
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