> I don't think anyone makes A-plug to A-plug cables, do they? 
> In which case I'd 
> have either a B-plug or an A-socket left with no real use...

http://www.voti.nl/shop/p/CABLE-USB-1-5-A-A.html

I have not yet seen a (full size) B-B cable, but they might exist too.

Some reasons: 
- B sockets are a bit high, so some designs use A sockets for the
device, even though  this is against USB specs. (IMHO it would be better
to use the newer small B sockets)
- A fellow teacher deliberately designed his PCB for A sockets, so the
chance of students taking the PCBs home would be (a bit) reduced.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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