Bryce, already known for his great hardware extensions for the CPC, released a new hardware design which converts the RGB signal output of the CPC to a SVideo signal. It consists only of a few hardware components and is very cheap to build. Because some users requested it to be as small as possible to integrate the circuit into their CPCs, Bryce designed it to be as small as possible. You can get the schematics, the board layout and a more detailed description in the “[[RGB SVideo]]” article in the CPCWiki. You can discuss the hardware here.
I can’t really claim the design was mine, it’s the standard schematic released by the IC manufacturer and the first picture above is actually from Charlie not from me, but I’ve compressed the layout quite a bit, so that the final Circuit will be a mere 25mm x 40mm. The layout in the Wiki isn’t that small, but I will add the mini-layout at a later date.