From: "Bob Carpenter." <rgc3679@...>
Date: 2011-07-19T23:39:27+09:00
Subject: Re: Ruby + USB + CCTV Camera Driver?

Phillip Gawlowski wrote in post #1011518:
>
> The third problem is that USB isn't even capable of *reading*
> different voltages, much less a waveform! It can read an on state and
> an off state. Analog signals are "composites" of different wave
> lengths--you have electrical power as carrier wave, on top of which
> you modulate all your other waves carrying actual data--which a
> digital connection just can't handle (after all, that's what ADC/DAC
> chips are for ;).
>

Thanks for the education - very much appreciated!

I will look for fully digital cameras or an inexpensive way to do ADC, 
maybe via add-on board. Brian Candler has suggested several cameras that 
I will look into.

Thanks,

--Bob

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