Re: Suggestions: a circuit which converts digital video signals from a DVI for output on a display medium (such as a CRT).

Paul Hovnanian P.E. wrote:
> Glenn Gundlach wrote:
>
> [snip]
>
>
>>You're quite correct. In fact, I'm looking at one right now. It's
>>called (Rich, did I use the apostrophe correctly?) a video card. The
>>DVI connector is simply a means to move the digital data off board to
>>another. All video cards with a VGA connector have RGB DACs on board
>>(with a little longer cable than you imagine in your description). With
>>good coax cable and properly interfaced in the analog world, you would
>>not be able to see the difference.
>>
>>Now for a DLP or LCD, the digital data is converted to PWM to get
>>variable (analog) intensity but does the same task as the DAC to CRT.
>>
>>Sorry to rain on your parade. It's been done.
>
>
> It can't be that tricky. Apple sells their mini Mac with only a DVI
> output. They give you a little DVI to VGA dongle that is a little over
> an inch long and just wide and high enough for the connectors on either
> end.
>

On the DVI connectors, some of the pins are dedicated to analog output.
So the DVI out has both anolog and digital. You 'dongle' is just a few
wires to connect the good pins to the VGA connector.


.

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