I can think of few other ways to wave your geek flag as wildly at work than to wear one of these ties that looks just like a circuit board.
Michael Phipps of Scatterbrain Ties silkscreens these convincing looking circuit ties by printing metallic copper and silver inks on a green (or black) microfiber fabric. The artist doesn’t say what the circuit board is from, but without any parts on it, I doubt it would work anyhow. Though I think it would be cool if it actually had foil conductors instead of inks and had a whole computer system built into it. I can dream, can’t I?