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This video shows how I built an ultrasonic tape measure using an Arduino Duemilanove, a PING))) sensor, and a 7-Segment Shield. As someone guessed in the comments, I developed this distance sensor as a component in my Arduino Nerf sentry gun project.

As soon as I get a chance to clean up the code, I’ll post my Arduino sketch here on Make: Online.

In the Maker Shed:

makershedsmall John Park in the Maker Shed: Ultrasonic distance sensor

PING))) sensor

7-Segment Shield

John Edgar Park

John Edgar Park likes to make things and tell people about it. He works in CG animation at DisneyToon Studios and writes for Make, Boing Boing, and other places online and in print. You can find him at and twitter @johnedgarpark — if you like that sort of thing.

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