No. The MeccaBrain is Arduino-compatible and has a library for it. The only problem is that Meccano does not give instructions for those who want to custom program using the Arduino IDE. I however will use the MeccaBrain. I do not intend to replace it with Arduino for my project, rather, I would like to connect a non-Meccano sensor (Parallax PIR) to the MeccaBrain's port. Looking at the socket, I think that a female 3-pin jumper wire connector may work (although I cannot be certain). Can anyone help?