19th Century Telegraph Key - Educational Activity

The telegraph was one of the earliest devices to harness the power of electricity to communicate. It revolutionized long-distance communication. The telegraph key was an essential component of this communication device. Through this activity your students will build a working telegraph key and learn about simple circuits and some basic aspects of conductivity.

** Note:**
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http://www.ingeniumcanada.org/education/3d-educational-resources/3d-telegraph-key

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