Alternative short distance rangefinder: measures light transit time, not reflection angle

Here’s a device available on a pair of Sparkfun boards that Rod pointed us and Triangle Amateur Robotics to:

http://datasheet.octopart.com/VL6180XV0NR-1-STMicroelectronics-datasheet-26529471.pdf

Update from Rod: A sensor + ARM M4 eval board for $20 from the chip maker:

 http://www.mouser.com/ProductDetail/STMicroelectronics/EVALKIT-VL6180X/?qs=sGAEpiMZZMvfpQN6QVmrfGjb%252b49cDybCa83Lgq8kEXU%3d

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