Interactive tabletop playing surface (Space Hulk Hobby Challenge)
Piece connectors
All rooms are connected by "door" piecesAt every edge of every terrain piece are doorframes, into which a three-way connector is added.
Having just three connectors is important, because we can run power/ground on the outside and keep the centre pin for sending/receiving data. Obviously, using four pins (power, ground, TX, RX) would have been much simpler, but then, at some point, we’d end up plugging a TX into an RX, if the pieces were rotated.
It was important to be able to keep to a single-wire system. I used tin-plated steel for the actual connectors, so that wires could be soldered to them, and they could still be joined using small magnets (soldering directly onto a magnet can sometimes cause it to lose its magnetism, as they are easily damaged through direct heat).
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