Neural Impulse control

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Presentation transcript:

Neural Impulse control Da’janel Roberts Matthew Morgan Jonathan James

Goals Replicate Brainmaster amplifier design. Determine whether the Brainmaster design can actually measure brainwaves.

Replicating Design Ordering parts: Adrian Smith from group N1 ordered the parts for the design. Difficulties with the OP-90 -Only available in surface mount. -Adrian had to order adapters. All parts arrived by March 15, 2002.

Replicating Design Board completed the day after all the parts arrived.

Testing the Brainmaster Initial inconsistencies: -Sometimes the amplifier worked, and sometimes it didn’t. -The problem turned out to be bad solder joints. -The amplifier output became consistent after re-soldering the faulty joints.

Eyebrow Test The electrodes were placed on the forehead high above the right eyebrow. When the eyebrows were lifted and held up, the amplitude of the signal changed dramatically.

Frequency Content When the eyebrows were relaxed, the FFT of the output of the amplifier revealed a peak at 20 Hz. This could possibly correspond to a beta wave.

Noise Problems? Noise was generated by physically moving wires. Also, there was some noise in the frequency response when the electrodes were shorted together.

More Experiments Use the amplifier on a subject before and after heavy caffeine consumption. If we are reading brainwaves, the frequency of the 20 Hz spike should increase.