The RGB connection kit made by Mobius Strip Tech is a perfect example of new homebrew work on CD-i and we're proud to see members work on projects how to improve the signal output! CD-i member RiVLez took it a step further by implementing this perfectly in the current connector outputs, by removing the yellow video jack connector and building the RGB connector right in.
Mobius actually offers two solutions: "We offer 2 options for output. 8 pin miniDIN. This outputs 75ohm RGBS. Meaning your cable is
expected to have no components installed in it. It should be a
“pass-through.” We recommend this cable. Otherwise a 9 pin miniDIN. This outputs standard Sega Genesis/MegaDrive Model 2
level RGBS. Meaning you are expected to have 220uf capacitors and 75ohm
resistors in your cable for RGB. With a 470ohm resistor and 220uf
capacitor for Sync. We will also connect composite video to the
composite video pin. This signal is compatible with any standard Genesis
2 cable. We recommend HDRetrovision component or Retro-Access SCART cables. You have the option of having the composite video jack removed and a
miniDIN installed in it’s place or a hole drilled in the console for a
new jack. Locations are limited on 450/550 models and some others. If you choose to have the jack installed in place of the composite
video jack, please note that some plastic will still need to be removed
to ensure adequate space for the cable hood."
[Thanks, RiVLez]