First post, by schlika
Hi Vogoners !
A friend of mine came across this board, we have no idea what it can be or where it comes from. It seems to add functionality to something by interposing itself between a board and a 40pin DIP IC ...
There is only one marking : ADPSTF(A)

I drew a quick schematic. The C547C Transistor has the BCE marking on itself ... ???

Thanks a lot !