  This paper presents advancement towards making an efficient and viable wheel
chair control system based on brain computer interface via electro-oculogram
(EOG) signals. The system utilizes the movement of eye as the element of
purpose for controlling the movement of the wheel chair. Skin-surface
electrodes are placed over skin for the purpose of acquiring the
electro-oculogram signal and with the help of differential amplifier the
bio-potential is measured between the reference and the point of interest,
afterwards these obtained low voltage pulses are amplified, then passed through
a sallen-key filter for noise removal and smoothening. These pulses are then
collected on to the micro-controller; based on these pulses motor is switched
to move in either right or left direction. A prototype system was developed and
tested. The system showed promising results. The test conducted showed 99.5%
efficiency of movement in correct direction.
