Hi all:
Someone on the list was asking about an electronics text in braille.  Well,
I don't know of any up to date ones, but recordings for the blind has a
couple that may help.  One is solid state design for the radio amateur.  Rfb
did a good job on schematic descriptions  in this one, and it has a lot of
good basic information in it.
Another good basic book is introduction to rf design by Chris Bowick, also
available at rfb.  This one covers a lot of basic passive filter design and
a couple of chapters on solid state design.
For some good basic information on digital techniques rfb also has the ttl
cook book by Don lancaster.  They also did a good job of schematic
descriptions on this one.
Also available from rfb is the active filter cook book which has some good
background on op-amps and active filter design.
I had most of these books read by rfb, and they did a good job on them.  I
found that you must tell them that good schematic descriptions are essential
or sometimes they will skip them or just give a very schetchy description
which is of no use.  If you want an example of a very poor job of schematic
descriptions, look at rfb's recording of the 1977 arrl handbook.  In many
cases they eliminated the schematics which made the book totally useless in
my mind.
One of the problems today is that there is no good source for information
about electronics for blind people such as the braille technical press was
about 20 years ago.  I think that with a little work something like that
could be started again.  Let me know if there would be any interest in
something like that.
Hope this info helps.

Tony McCloskey, WA3CAO