On Mon, Jul 18, 2011 at 5:20 PM, Bob Carpenter. <rgc3679 / yahoo.com> wrote:

> If it's impossible, is it because reading voltages at USB pins cannot be
> done in software?

Shortest possible answer:  Yes.

> I have not found any reasonably priced digital cameras - reasonable
> being in the range of $50/unit for quantities of 100. Please let me know
> if you have seen any.

Haven't had a reason to look  :-)

Good luck!

-- 
Hassan Schroeder ------------------------ hassan.schroeder / gmail.com
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