Mind Readers

TJ Strzelecki (Presenting)Matt Waldersen

Rick SchumanKrishna Jharjaria

What We’re Doing

The proposed project will be a mobile brain-computer interface.

Computer applications will be presented to the user through commercially available video glasses.

An EOG and commercially available EEG will be mounted inside of a common enclosure and will enable the user to navigate and select various applications.

A dsPIC microcontroller will be used to acquire the EOG and EEG signals, the EEG signals will be analyzed by an FPGA and a BeagleBoard XM will control the virtual reality environment as well as execute all of the computer applications

Project-Specific Success Criteria

1) An ability to encode/decode data packets from a NeuroSky EEG.

2) An ability for a user to select applications based on signals from a NeuroSky EEG.

3) An ability for a user to navigate between different applications on a display using EOG signals.

4) An ability for the system to interactively train the user to effectively operate the device.

5) An ability to display a live video stream from an external camera module, and integrate applications into the video system.

Block Diagram

Sensitive analog circuitry (EOG) Distance between electrodes and

filtering/amplification Size of EOG PCB FPGA module connection (50 pin DIP socket) Data retrieval from and mounting of Wireless

EEG Dongle Communication between main PCB and

BeagleBoard Communication between EOG PCBs and main

board Access to DSPIC and FPGA for programming

PCB Design Considerations

Microcontroller Considerations

In system programmer Manual reset button Oscillator circuit Logic level translators

Power Supply Considerations

Multiple voltages levels and polarities required

Heat dissipation Current requirements

Main Board

Main Board

DSPIC33

Main Board

EOG Connectors/Logic Converters

Main Board

Linear Regulators/ DC Inverter

EOG Boards

EOG Boards

EOG Boards

EOG Boards

EOG Boards

Differential ATD Converter

Questions?

Reference (DSPIC33EP)

Reference (RJ-12 Connection)

Reference (PIC Programmer)

Reference (Oscillator/Reset)

Reference (DC Voltage Inv)

ADS1210 ATD

OPA4131 (Op Amps)

LT3083 Linear Regulator

MAX764 DC Inverter