Whatever is to be magnified is placed on movable platform beneath the monitor and camera so that the user can pan around and freely examine all portions of the material. These devices allow the user to modify contrast, reverse contrast and change foreground and background color, if desired. Example Chroma CCD by Telesensory Corporation Instructional Materials Simplified instructions for using assistive technologies should be placed by each accessible computer. Cassette Tape Resources for Braille Materials Braille documents can be produced from computer text files using Braille translation software and a Braille printer. Alternately, material can be scanned into a text file and then exported to a Braille translator.
Braille printers are significantly noisier than dot matrix or laser printers.
They should be placed in a sound-proof enclosure where library patrons will not be disturbed. Although useful for some persons with physical disability who are unable to use a keyboard, it is currently felt that the technical requirements of this type of software application limit its effective use in public settings such as libraries.