I thought I could take my mini display port to DVI adapter and hook that to my apple DVI to composite video/SVideo adapter and feed my analogue TV. Turns out the DVI to Comp Video/Svideo has the necessary "C1 thru C" Pins that carry the analogue R,G,B and Hsync pins but the mini display port to DVI is digital only and doesn't even have holes for those pins, only the fat center blade for analogue ground it there. Of course I found this out after bending the pins on the Comp video adapter cable. ;-( I pulled apart the cable and it's got a lot of little circuitry that must take the component video and convert it to composite and Svideo.
Now I'm thinking I could take a mini display port to VGA cable out of the mac and take a VGA to DVI adapter that would have the necessary "C1 thru C4" pins and then I could plug the DVI to Comp Video/SVideo adapter into that. Any reason to think a DVI to VGA adapeter wouldn't work in reverse? I figure those are all just pin to pin connections but I'm not positive.
I have found some more elaborate boxes on line that will pass thru a VGA signal and extract the comp video and S/video but they look to require USB power which the apple adapter doesn't require. I wonder where the apple comp video adapter gets it's power from and if that power would be interrupted if I use the VGA to DVI adapter. Any thoughts?
John Moore
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net
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