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Google didn't want us turning on our unit, so we had to figure out our own way to power up the IR projector.

A little gentle power applied, a home-hacked IR camera, and presto! Shiny dots on the photo room wall!

The bright grid of dots shows that Tango works similarly to the original Microsoft Kinect, with a grid of dots to be captured by the IR sensors of the 4 MP camera, building a depth map.

How does a grid of dots build a depth map? With science.

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