Ben takes on a viewer challenge to create a TV proximity sensor to keep kids from sitting too close to the screen and ruining their eyes. He builds a device that uses an infrared sensor to set off flashing LEDs and a piezo buzzer if kids move too closely to where it's mounted on the TV.

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  • Episode Number 13
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  • Originally Aired Sunday, January 26, 2014
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  • Last Updated By cbensi
  • Last Updated 01/28/2014 1:43pm