Posted: Tue Jul 11, 2006 1:20 pm
VGA->HDMI - not possible... DVI may have analog signals in it, but HDMI is DVI minus the analog signals and put in a different style connector. To convert analog to digital that can be used by a DVI/HDMI input is going to require some money... those converter chips come with a nice price tag (you 'could' rip one out of an LCD panel though, but then you need to know exactly what to do to wire it up... purely hypothetical as well).
VGA->Component... isn't that hard because VGA is technically RGB plus a little more. It'd be easier to do RGB to component though because it uses the same sync rate, where as VGA uses higher sync rates. It's rather simple though, you use an adder to add up the Red Green and Blue which gives you Luminance (Y) then you send that two directions, one out and the other to a polarity mixer that flips the polarity to negative. Then you combine that neg Y signal to both the Blue and Red signals giving you the Pb and Pr signals.
You can build one by hand for like 25 bucks, but it's quality is gonna be rather low. You can buy them for around that price too, but again the quality is probably gonna be kinda shotty. For a quality one that doesn't destroy all to much quality is like 100 to 200 dollars.
VGA->Component... isn't that hard because VGA is technically RGB plus a little more. It'd be easier to do RGB to component though because it uses the same sync rate, where as VGA uses higher sync rates. It's rather simple though, you use an adder to add up the Red Green and Blue which gives you Luminance (Y) then you send that two directions, one out and the other to a polarity mixer that flips the polarity to negative. Then you combine that neg Y signal to both the Blue and Red signals giving you the Pb and Pr signals.
You can build one by hand for like 25 bucks, but it's quality is gonna be rather low. You can buy them for around that price too, but again the quality is probably gonna be kinda shotty. For a quality one that doesn't destroy all to much quality is like 100 to 200 dollars.