/diy/ - Do It Yourself

>>1115285
You could cludge something together with a few components and software if you're up to the challenge. A circuit like this will give you a black and white signal if connected to the composite or S-video input. Your monitor resolution needs to be set to 640x480 60hz.

Color is a bit more complicated since VGA uses separate wires for R,G,B intensity, but S-video uses one wire for brightness and another for hue. Composite makes it even more complicated by sending hue as the phase shift of a sin wave.

What I'd do is use the attached picture but not connecting pin 1 (red). Connect pin 1 to the S video chroma input. You now have a system where the blue and green from the source control the black and white brightness and the red controls the hue. You could make things look right in software. For example if a pixel is supposed to be: R:180,G100;B50 you convert this to Hue/brightness to get Hue:23 Brightness:45. This means the pixel should actually be set to R23,G45,B45.