03 Apr 2013, 17:29
Let's take the picture as only that. We're maybe close right now to being able to make snap together modules like this, but not wireless ones. Just on cost alone. Let alone the complexity of tiny, independent yet dependent batteries.
Key caps come in 1/4 unit increments, right? 1.0, 1.25, 1.5 and so on. I'd make that the key. Think of Lego bricks which snap together using regular subdivisions. Indeed, I remember some electric capabilities in Lego Technic (vaguely, from maybe 20+ years ago) where lines of metal joined the appropriate corners of the dimples. An all-electric version feels feasible at first sight.
One special component could be the master. It houses the USB / Bluetooth controller and talks to all the other key modules. If there's a battery involved, it goes there.
Going with mechanical switches (as if we wouldn't) won't make anything as slim as this. We'd have sizeable thickness from the switch bodies alone. Plenty of space for a crafty connector every 1/4 unit along top and bottom edges, plus a straight one on left and right sides. Could it be done without a chip for every module though? I've a suspicion there could be a way to make a self-building matrix, somehow, from metal contacts alone.