Slideshow

Laugh sensor among oddball wearables at Japanese expo

Some devices are conceived with the best intentions, but the execution falls flat

  • The WaratTell laugh sensor, shown off at the first Wearable Device Technology Expo in Tokyo this week, monitors how often seniors laugh, talk, cough or fall down.

  • This power generation suit, shown off at the first Wearable Device Technology Expo in Tokyo this week, contains eight piezoelectric patches to generate electricity. But don't count on it charging your iPhone -- it's only strong enough to power a temperature sensor and Bluetooth module.

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