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Using brain Computer Interface (BCI) technology, the electrical signals from the brain are extracted and processed to control a specific task. Extraction of brain signals from various regions of the brain using both invasive and non invasive techniques and the use of this signal in real time application is essential for mind controlled wheel chair. There are various non-invasive BCI techniques such as EEG, Electro-Oculography. EEG technique deploys an electrode cap that is placed on the user’s scalp for the acquisition of the EEG signal, which relates the scalp potential differences to various complex actions. Classification of the EEG signal has been made into several bands like alpha, beta, delta, theta and mu suppression. With the advent of technology the EEG acquisition devices are made more compact, handy and wireless.
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