Design and Implementation of Bangla Braille Key for Blind Examinees of Bangladesh

The blind or visually impaired students (VIS) of Bangladesh depend on scribes for appearing in examinations. VIS normally face many difficulties to find out suitable scribe, who is supposed to write the answer in the answer scriptsafter hearing from the VIS in the examination hall. Scribes need to be present throughout the examination for writing the answer scripts. Though there are several approaches were proposed for appearing in the examinations independently without taking help from scribe, very few methods are proposed for Bengali. As an alternative way Bangla Braille Key is proposed with audio feedback of typed words using braille syntax. The Key has six pushbuttons arranged in a 3*2 matrix similar to braille syntax which is interfaced with a computer by using Arduino Uno and CoolTerm software. Theaudio feedback system enables the examinees to hear what they are typing. The written braille codes will be converted into the Bengali letters and automatically be saved into predefined format during the initial setup by examiner or scribe.