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 becouse of the Digitaly Programmable Potentiometers they are used to set the Gain, frequency range, and can calibrate multiple analog boards for different EEG tests.
The digital POT made by analog devices (AD5204) has 255 positions can be adjusted by the microcomputer that can receive commands from the computer. This is a great way for analog circuitry to have digital control.
The AD5204 is a chip with 4 digitally controlled POTs and the pots can be daisy chained to have multiple chips controled by a single SPI interface.
