These distance or motion sensors use sound reflected from an object to detect changes in its position. Most designs were based on the sensor developed as the range finder for Polaroid’s cameras. You can...
rogerfrost.com is a compendium of ideas for teachers using technology in school. It shows how to use technology, such as measuring sensors, to find answers to science questions.
Now retired, Roger Frost was a copywriter and journalist so you’ll stumble on articles from wayback when. Do use and credit anything with a link back here. And do drop us a helpful line sometime.
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