Well, then... erm...Not sure since this is capable of being a full controller replacement.
Only 6 pins are analog IO.
There's a lot of good information here! I would really like to make my IBM selectric wireless. I can probably fit 4 D cells in there pretty easily, so powering it will be cake.
I was looking into this earlier. I know that bluetooth modules are pretty cheap (like the one above) but to be honest, I'm not really familiar with it to just make it work. How are the data packets handled? How do I make the computer detect that it's a keyboard? I'd rather have RF, personally.
Could tear down and install one of these, just make openings for LEDs and charging.
http://handheldsci.com/kb
Wow, looks good, but UGH, it's $59? That's almost as bad as the QIDO (which is great, but also overpriced, IMO)