Cognitive Load EEG Headband Kit with ESP32 + LED
Cognitive Load EEG Headband Kit – Monitor Mental Workload with ESP32 & OLED
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Wearable EEG is no longer confined to research labs. This kit gives you everything to build a headband that reads your brain's electrical activity through a single dry electrode, amplifies the microvolt signals with precision op-amps, and uses the ESP32 to compute real-time alpha and beta band power. The OLED display then shows your mental workload level—visually mapping the shift that happens when you switch from a relaxed to a focused state.
What You'll Build
A self-contained EEG headband capable of logging alpha/beta power ratios with timestamps. The OLED provides immediate color-coded workload feedback, while all raw and processed data is stored on a microSD card. You end up with a portable tool for cognitive load studies, human-factors experiments, or personal productivity tracking.
What You'll Learn
- Amplifying microvolt-level EEG signals using LM324 op-amps and the ADS1115 16-bit ADC
- Configuring the ESP32 for real‑time biosignal sampling and on‑device FFT spectral analysis
- Extracting alpha (8‑13 Hz) and beta (13‑30 Hz) band power to estimate cognitive load
- Integrating DS3231 RTC and microSD logging for timestamped data that can be exported for further analysis
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | x1 |
| ADS1115 16-bit ADC | x1 |
| LM324 Op-Amp | x2 |
| Electrode Gel Snap | x3 |
| DS3231 RTC | x1 |
| MicroSD Module | x1 |
| 0.96in OLED | x1 |
| 100kΩ Resistors | x10 |
| 10kΩ Resistors | x10 |
| 100nF Caps | x15 |
| 3.7V LiPo 1000mAh | x1 |
| TP4056 Module | x1 |
| PCB Prototype Board | x3 |
| EEG Headband | x1 |
| Soldering Iron | x1 |
| Solder Wire | x1 |
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
This kit is designed for advanced makers, B.Tech final‑year students in ECE or biomedical engineering, research scholars prototyping cognitive load experiments, and professionals curious about neurofeedback. It’s especially relevant for instrumentation‑heavy projects at IITs, NITs, VIT, BITS, and central universities where capturing and interpreting biosignals is a core objective.
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 guides you step‑by‑step, and our WhatsApp support is available for tricky debugging. Most builders complete the hardware integration within the first few sessions.
Can I use this for clinical EEG recording?
No. This is a single‑channel research‑grade tool for cognitive load monitoring, not a medical device. It’s ideal for academic projects and personal exploration, not diagnostic use.
How do I interpret the alpha/beta ratio changes?
The kit’s AI companion explains the spectral analysis, and the OLED shows colour‑coded workload levels. You can also export raw and processed data to MATLAB or Python for custom analysis.
Is the headband comfortable for long sessions?
Yes. The included elastic headband has snap electrode placements that fit adult head sizes securely. The dry gel snaps require only light pressure, making it wearable for 30‑60 minute sessions.
Single-channel ADS1115-amplified EEG detects alpha/beta ratio shifts indicating mental workload changes.
What's in this kit
- ESP32 Dev Board
- ADS1115 16-bit ADC
- LM324 Op-Amp x2
- Electrode Gel Snap x3
- DS3231 RTC
- MicroSD Module
- 0.96in OLED
- 100kΩ Resistors x10
- 10kΩ Resistors x10
- 100nF Caps x15
- 3.7V LiPo 1000mAh
- TP4056 Module
- PCB Prototype Board x3
- EEG Headband
- 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