This is a short video that demonstrates how Tiffy template can be used by the blind to identify Indian currency notes. I will post CAD drawings so that anyone with access to a laser cutter can make these for their friends. Please check the new website of our Trust – ‘The Masters Touch’–www.themasterstouch.in for details.
If you cannot make these yourself, please feel free to contact me and I will if arrange for you to get some. You could also print them on card paper and cut them out. The size must not be altered!!
mail me your email ID for a drawing file.
The above two videos are the demonstration of SLRBD V2. There is a slight creaking sound caused by springs connected to the refresh bar. This proto has been made with a lot of acrylic as it is cheap and easy to work with, but it is heavy and flexes a bit as is evident in the video.
The line refresh rate is about 100ms (30ms per dot line). Refreshing is done manually using a refresh bar. The lines displayed have been hard coded for this demonstration using an Arduino controller board. Software still needs to be developed to make it a stand alone device.
There were 2 errors pointed out to me by a blind Braille teacher while doing a real time test. The comma and exclamation marks in the visual Braille text equivalents (RNIB Braille font )are wrongly represented. I have since made corrections to my reference Braille table and I have also written to RNIB to inform them of the errors in their Braille font.
Ruby Alphonse is a blind music teacher who tested SLRBD V2 for me. Ruby is trying out a working prototype of a Single Line Refreshable Braille Display (SLRBD). I programmed it to display 3 twenty character lines of text in Braille …”Literacy, Illiteracy” “With Braille you can” “Feel the difference
These are my friends Chandana and her mother Latha. Chandana’s sight began deteriorating as a child, and she lost her vision completely by the time she reached her teens. She is currently studying at Mt. Carmel College in Bangalore. Here she is doing a test of SLRBD 1. She had no difficulty reading the 3 lines of text that have been hard coded. The entire family have been very encouraging supporters of this project and were very excited that something has actually been done! The text displayed read “Literacy, illiteracy, with Braille you can feel the difference”!
Sorry about the high levels of ambient noise!
Mr. Richard and his wife Vinodha, both blind are retired teachers from the Divine Light School for the Blind in Whitefield, Bangalore, India. They each have over 30 years of teaching experience and are testing SLRBD V2 for me. I hard coded 3 lines of 20 characters each, with 2 reference lines of ‘all pins up’ and ‘all pins down’ that repeat in a loop to demonstrate the SLRBD. The test lines state “Literacy, Illiteracy” “With Braille you can” “Feel the difference” . In an initial test, they discovered that the comma and exclamation mark had an erroneous dot combinations! I had used a font called ‘RNIB Braille’ to give me the dot equivalents of what I was encoding – and it had errors! This test was repeated with the dot positions corrected.
There was a power outage and so I had to ask the Richards to do the test on their balcony to make use of sunlight – but the ambient noise level was quite high!
This silent video was made to describe the ‘Proof of Concept’ Refreshable Braille Display display device. The coin flipping is used to depict the scale of the Braille cells and the imperceptible but firm action of the actuators. If you want a slightly more detailed video – look at ‘Lincoln Flips’.
This video focuses on the visible portions of the row & column actuators and shows how they are used to control individual elements of the Braille Matrix. If you want skip this technical video – look at ‘Lincoln Flips’ or ‘Nat Geo Final Presentation’