Team Members: Shay Kreiser, Shira Alkoby

Supervisors / Mentors: Dr. Shimon Mizrahi

 

Electroencephalography (EEG) is a widely used method for recording electrical activity in the brain. While modern EEG systems offer comprehensive brain coverage and high-quality signal acquisition, they are often expensive, bulky, stationary, and uncomfortable. These limitations restrict accessibility, especially in mobile or cost-sensitive research and clinical settings.

We designed a compact, affordable, and portable EEG system. We developed a device that maintains reliable signal acquisition while being easy to operate, comfortable to wear, and capable of functioning independently for extended periods. The system focuses on a specific brain region at a given time, allowing targeted investigation of localized brain functions.

We built a fully functional multi-channel EEG device using KiCad for PCB development and LTspice for simulating the analog front end (AFE). Our system includes three independent input channels, operates with 12-bit resolution at a 500 Hz sampling rate, and communicates wirelessly with a computer via Bluetooth. The device is battery-powered, enabling approximately seven hours of continuous use on a single charge.

The final prototype successfully captures and transmits brain activity in real time, enabling simultaneous analysis in both time and frequency domains. The effective signal acquisition bandwidth ranges from 0.26 Hz to 51.8 Hz. The system provides a legitimate alternative to conventional EEG machines, making it suitable for practical brain function studies.