This is my project for which I am looking for more information, and I don't feel very confident. Its broad and I am not finding relevant information. I would appreciate links and journals suggested.
While in your project you may "re-invent" the ATM to be accessible to the blind, you may take another path that is to add "accessibility features" to the existing design.
You may find this article relevant to your point of research: http://dl.acm.org/citation.cfm?id=2460625.2460665&coll=DL&dl=GUIDE&CFID=492161567&CFTOKEN=28279956
For a whole body of work relevant to accessibility of computers, I highly recommend you take a look at: ASSETS (International ACM SIGACCESS Conference on Computers and Accessibility)