Programmable Chip EEG

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The Programmable Chip EEG is a dual channel electroencephalograph that could be a brain-computer interface.

The Programmable Chip EEG is programmable because it uses Digitally Programmable Potentiometers. They are used to set the Gain, frequency range, and can calibrate multiple analog boards for different EEG tests.

Parts used in the PCEEG:

To reduce noise in the readout of the analog part of this circuit, a common-mode feedback is passed back into the body by the driver right leg circuit. Band reject filter may also be used (to reject, for example, 60Hz noise from nearby A/C power wiring).

The resulting analog signals will be passed into a digital circuit, based on the Cypress PSoC microcontrollers, which will digitize the signals, further process them, and provide an interface to a computer.