1 Mid Presentation Optical Simulation System for Brain Waves Detection & Measurements המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory הטכניון - מכון טכנולוגי לישראל הפקולטה להנדסת חשמל Technion - Israel institute of technology department of Electrical Engineering Presenters: Tomer Zilbershtein Shahar Porat Supervised by: Yivgeny Rivkin Winter Semester 2002

2 Short Description A program, which has a graphical user interface that, allows the user to change different pictures in different sizes and in different frequencies. While changing pictures, the system will generate a synchronized pulse signal to another device, which examines the brain signals. The system main purpose is to check eye vision.

3 Block diagram

4 Technical Specification 21 inch monitor Angle resolution of line: 5 minutes in distance of 2 meter. Synchronize resolution: at most 1mSec. The External Stimulator Coupler requires TTL level signal of at least 50 uS duration (>3.5V). The trigger signal must return to the low level before the end of a sweep (256 mS).

5 Hardware Requirements Power Supply: Vcc (5V) Connectors: RS232, BNC Data Rate: 20 bps

6 Implementation Graphical User Interface: using VB. Synchronize signal: through the serial port. Adjust the signal to TTL level (in Hardware).

7 Serial port output signal

8 Scheme

9 Alternative Implementation Synchronize the output signal using information from the screen. Picture A: Red line Picture B: Blue line

10 Video card signal Measured with 1Mohm probe VsyncRed line

11 State Machine f = 3/10u = 300KHz

12 Alternative Scheme

13 Program Flow

14 Schedule 16-22/12 Complete the design of the voltage converter /12 Testing the system in the Hospital. 30/12-26/1 according to the results: Improve the system Contrast, Brightness. Work with two monitors. work on the alternative solution. Hardware (two weeks). Testing (two weeks). 27/1-2/2 spare time.