Shreedeep Gangopadhyay, Molay Kumar Mondal and Arpita Pramanick Techno India, Salt Lake, India Professor, IIITM-K, Trivandrum, India
ABSTRACT
A thorough understanding in mathematics enhances educational and occupational opportunities for all,whether sighted or visually impaired.. However, solving complicated mathematical problems is difficult forvisually challenged students in schools and universities as the calculators available in the markets with smooth input keys and LCD outputs are useless for them. Using the assistive technology which is basicallya service or product to help people with disabilities function more independently has removed barriers toeducate and employ people. An optimal solution for them is Braille calculator with audio output. In thispaper, we have proposed a cost effective, hand-held, battery-driven, low power assistive device aiming thevisually impaired people from low income settings. The input is given through a 4 by 4 Membrane keypadwhich has been Braille-embossed using indigenous methods. The output is announced in natural English bythe audio unit via speakers and/or headphones up to two places of decimal point. The system is implemented on custom made open source Arduino platform, making it efficient and cost-effective.
KEYWORDS Braille Keypad, calculator, Arduino, assistive technology, visually challenged. Original Source URL: http://airccse.org/journal/ijesa/papers/5315ijesa01.pdf http://airccse.org/journal/ijesa/current2015.html
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