In these days most of the people are suffering from paralytic diseases which instigates a lot of disabilities like not able to speak, not able to do any physical activity and it’s very complicated for them to express their regular requirements, yet able to use their eyes and often move their heads. There are few disorders like Diplegia, Locked-in syndrome, Quadriplegia and Amyotrophic lateral sclerosis (ALS) where a casualty is aware of what’s happening with the environment but not able to respond because of loss of ability to move few voluntary muscles in the body other than eye movements and eye blinking. There is a solution for these victims to communicate with people and also able to access their crucial passwords is the virtual keyboard. This paper uses a Brain Computer Interface (BCI) principle. By accessing virtual keyboard, it helps the victims to type letters which will be displayed on the monitor screen and it is designed using Matlab programming. The BCI principle is translating the patterns of brain activity produced by the user into its corresponding commands. Signal acquisition and signal processing is composed by BCI.

Brain Computer Interface (BCI), EEG, Eyeblink, Virtual Keyboard