I have a //c serial to parallel/centronics converter box from when I was a kid. I still have the matching parallel printer, but sadly it doesn't look like the ribbons are available any more. I have since acquired an ImageWriter II (which does have ribbons available), so I don't need to use this. But I recently picked up some Epson FX compatible Commodore printers that have both the Commodore serial and centronics ports on them (and have ribbons available). I was thinking about testing out printing from my //c to one of them.
Problem is, I don't recall exactly how this converter worked. Mainly, does it require power? It has a 3.5mm jack on the side that presumably is for power. But there is no regulator inside it, so I'm guessing if it did need power, it would need to be 5v. But as I understand it, some of these converters didn't need external power. I'm guessing they siphoned off the 5v form the printer side of the interface. I don't recall if I had to power this when I was a kid or not. I don't think so, but I can't be sure after so long. I can't locate any instructions for it in my pile of old Apple manuals. Its a Kameleon by Intronics, model 110. Goggling that leads to pretty much nothing.
Is there any way to tell if this does need power? I can trace out some of the pinouts if it would help. Here is a picture of the innards.