The Twiddler has enough keys and can easily be configured to represent the entire Braille alphabet and numbers.This config is based on the 1st version of the Braille Config.
So here is the 2nd variant of the Braille config.
Braille_v2_twiddler.cfg (266 Bytes) Braille_v2_twiddler.cfg1 (266 Bytes)
The mirrored Braille Cell is composed of 2 columns and 3 rows but we mirror it.
The Braille Cell on the Twiddler is outlined here.
If you hold the Twiddler with the keys facing you, Dot 1 is at the top right (L000 in Twiddler notation) and Dot 6 is in the middle column of row 3 (00M0). The left column is used to indicate that both dots are active in the row. More about this later on...
Standard Twiddler Chord Notation is outlined here: http://twiddler.tekgear.com/doc/doku.php?id=chordnotation1
So, to type the letter "a" just type R000.
Dot 1 = R000
The Twiddler does not support multiple keypresses in a row but Braille uses these all the time. In these cases just use the key in the right most column of the corresponding row to indicate double press. It is shown as 1/4, 2/5 and 4/6 in the image.
So, to type the letter "d" just type LM00.
Dot 1,4, and 5 = LM00
Capitalizing is handled through the Shift Button on the top right, beside the joystick, of the Twiddler. Just hold down Shift and type the lower case letter.
Numbers in Braille are preceded by a "#". For the Twiddler, just hold the Num Button, located at the top left, beside the joystick, of the Twiddler.
Contractions in Braille are also available on the Twiddler. Just try "for", "and", "the", "ing" and "ed".
This particular twiddler config variant maps the Braille Cell oriented as mirrored if the user is looking at the keys . This is because Twiddler is normally used with the keys pointing away from you.
Please give it a try and provide some feedback. We can work on other versions if you want to try something else out.