Gadgets & Design
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Smoke signals have been around for hundreds of years. So here's a clever iPhone case that uses that to communicate.
Dennis Be Bel's S.M.S.—or smoke messaging service—case heats and vaporizes lamp oil every time a simple button is pressed. Just don't expect a response that fast.
The puffs of smoke are also seen by the iPhone's camera. [Dennis De Bel via Motherboard]
