I have a Technic Interface A with the cables but lack the printed circuit board (PCB) for PC that I need to use it for automating my models. The card when it was for sale had markings of Lego 9771 and I assume this to be the part number.
Ideally I would like an original card but is there a way of getting a 3rd party card? Or another idea might be if someone does manage to make such an interface please consider building it to run multiple Interface A and/or B modules simultaneously.
I think that I may have parts that run on almost if not all of the powered interfaces that Lego has been kind enough to release. I would be quite grateful indeed if I were able to use them together in my sizeable Lego projects.