You may recognize the above picture as a map of the London Tube, which turns 150 today. This particular version of the map is also a working radio, which is rad. And it’s not a coincidence that this is possible. The guy who designed the original tube map had studied electronics engineering and purposely drew the map in the mode of a circuit board. Urban Times explains:

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This was the inspiration behind the ‘reverse-engineering’ of Japanese designer Yuri Suzuki, who used the tube schematic to make a printed circuit board, then, by installing components at strategic locations, turned it into a functioning radio.

And — here — you can see how he did it:

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