EEG Biofeedback Status Report Adrian Smith, gte198f Daniel Shinn, gte539f Ken Grove, gte262f ECE 4006 - Group N1 March 26, 2002.

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Presentation transcript:

EEG Biofeedback Status Report Adrian Smith, gte198f Daniel Shinn, gte539f Ken Grove, gte262f ECE Group N1 March 26, 2002

2 Overview of Completed Objectives l EEG Amplifier Ä Ordering parts Ä Assembly Ä Initial testing l Data Acquisition Board Ä Ordering based on application req. Ä Installation of board Ä Installation of drivers and software

3 EEG Amplifier (Parts) l Resistors: (1) 10K 1/4W 5% (2) 1K 1/4W 5% (3) 130K 1/4W 5% (2) 200K 1/4W 5% (2) 10M 1/4W 5% (2) 200K 1/4W 5% (1) 51K 1/4W 5% l Capacitors: (1) 0.47uF polypropylene (P474J) [$1.62] (3) 0.1uF polypropylene (P104J) [$0.74] (2) 0.001uF polypropylene (P103J) [$0.45] (1) 10uF 6.3VDC Tantalum [$0.52] l Integrated Circuits: (3) OP-90 amplifiers [$2.35] (DIP package was not available when placing orders so SOIC package was substituted with the use of an 8-pin SOIC to DIP adapter. Price reflects cost of DIP package, as this should be ordered in future semesters.) (1) 620AN amplifier [$5.92] (1) LM7805C voltage regulator [$0.43] l Other: (1) Set of 3 conductor signal leads [$14.40] (3) Disposable electrodes for each testing session [$0.24] (1) Pre-holed circuit board [$8.49]

4 EEG Amp – Assembly and Initial Testing EEG Amp Fully Assembled Group N1’s Lab Rat

5 EEG Amp Testing l Base steady state voltage = 2 Volts (o-scope) l O-scope used to measure voltage spikes during a given blinking sequence.

6 EEG Amp Testing l Jaw Clinching resulted in higher voltage spike.

7 Data Acquisition Board - Installation l KPCI-3108 Ä 16 analog single-ended or 8 analog differential. Ä 32 digital outputs Ä PCI interface l CAB-1284CC-2 l STP-36

8 KPCI-3107 (DriverLINX software) l Real-time data acquisition (with test panels) l Analog/Digital I/O programming Ä uses C++, VB, and Active X l Real-time Triggering via driver Ä allows user to specify trigger voltage and action to take after device is triggered.

9 The Next Step l Build a low-noise case for STP-36 break-out boards. l Connect EEG Amp to KPCI-3107 board and acquire desired signal. l Calibrate gain for the EEG Amp input signal into an analog differential input channel. l Research and learn how to use programming knowledge into a DriverLINX program. l Program driver for KPCI-3107 board to output needed digital signal.