Final Project

EEG Brain-Computer Interface

This project is a custom-built EEG (Electroencephalography) Brain–Computer Interface designed to detect electrical activity from the scalp, amplify and filter the signal, and stream data to a computer for visualization and analysis.

3D Model

Bill of Materials

• NUCLEO-F303K8 Microcontroller Board – 1
• TLC2274ACN Quad Operational Amplifier – 1
• MIC37100-1.5WS 1.5V Voltage Regulator – 1
• AD623AN Instrumentation Amplifier – 1
• USB-TTL Converter – 1
• PC817N Opto-Coupler – 2
• 1N4148 Diode – 4
• BZX84C3V6L Zener Diode – 1

Power Components

• 9V Battery – 1
• 9V Battery Snap Connector – 1

Passive Components

• 10pF Ceramic Capacitor – 1
• 100pF Ceramic Capacitor – 2
• 1nF Ceramic Capacitor – 1
• 100nF Ceramic Capacitor – 1
• 330nF Ceramic Capacitor – 1
• 1µF Ceramic Capacitor – 3
• 1µF Polarized Capacitor – 2
• 10µF Polarized Capacitor – 1
• 330µF Polarized Capacitor – 1
• 470µF Polarized Capacitor – 1
• 120Ω Resistor – 2
• 220Ω Resistor – 3
• 820Ω Resistor – 2
• 1KΩ Resistor – 5
• 2KΩ Resistor – 4
• 8.2KΩ Resistor – 1
• 22KΩ Resistor – 1
• 1MΩ Resistor – 3
• 500K Trimmer Potentiometer – 1

Electrode Assembly Components

• ECG Electrode Pads – 1
• Rubber Washer (10mm) – 1
• 13mm Button Snaps – 1

Prototyping Hardware

• Breadboard – 1

Timeline

• Week 5: Build 3D model & perform initial research /li>
• Week 6: Aquire all components and design circuit wiring
• Week 7: Minimum Viable Product through circuit signal collection
• Week 8: Website design for collecting signals and outputting answer
• Week 9: 3D print enclosure
• Week 10: Signal acquisition and debugging
• Week 11-14: Final testing, documentation, and website update