1 / 17

Electric Messages: Then and Now

Electric Messages: Then and Now. What will we do today?. Send a message - using yesterday’s technology Send a message - using today’s technology. Why is this experiment useful to teachers and students?. As a result of this activity, students should develop an understanding of

jeneil
Download Presentation

Electric Messages: Then and Now

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electric Messages: Then and Now

  2. What will we do today? • Send a message - using yesterday’s technology • Send a message- using today’s technology

  3. Why is this experiment useful to teachers and students? As a result of this activity, students should develop an understanding of • electrical communications • audio and visual applications of International Morse Code • electrical wiring, simple switches • teamwork

  4. Activity Objectives • Learn about electrical based communications. • Learn about the Morse Code system. • Learn about wiring, switches, and simple circuits. • Learn about teamwork and problem solving. • Learn about the history of communication and its impact on world events.

  5. Align the project to the curriculum framework or standards • This should be the first thing you do together with the educator • Consult education standards and get help from education department to align activity with • Science standards • Math standards • Technology standards

  6. History of Telegraphy • Ancient: Optical: Smoke signals – • 1800: Optical: Semaphore • 1832: Signal over Electrical Wires • 1837: Morse Code: Morse & Vale • 1891: World-wide cables • 1896: Radio telegraph: Marconi over 6 km • Codes, modulation, multiplexing • 1910: Printing telegraph • 1920: Telex network • 1970: Internet - Email • 1991: World-wide web

  7. The Titanic • The “unsinkable” ship set sail in 1912 • They received warning messages from the steamship Mesaba reporting a large number of icebergs • The Titanic hit an iceberg and began to sink • Initial signal distress signal code CQD • “Send SOS, it’s the new call” • Help was very near, but Call for help was not received by the Californian, only 10 km away

  8. Your Challenge • Build a device to send a message - using yesterday’s technology • Send a message- using today’s technology

  9. Materials • Aluminum Foil • Battery • Binder Clips • Brass Brads/Fasteners • Bulb • Cardboard • Wire (insulated)

  10. The Task (1) • Build a device that uses Morse Code • Test the device by sending the messageSOS – Save our Souls

  11. The Task (2) • Participant A:-Think of an emergency situation, then send a message explaining the situation and ask for help. Keep it secret • Participant B:-Once B understands the message report group and time taken on the flip chart – time from A starting to transmit to B understanding the message RULE No speaking, but B may nod after each letter or word. Once B thinks he understands the message he must tell A what he understands

  12. The Task (3) • Repeat the task reversing roles, but message must be different • Record time taken on Flip Chart

  13. The Task (4) • Repeat the task using a mobile phone message can be the same • Record time taken on Flip Chart

  14. Summarising • A sends message to B using Morse Code • B sends message to A using Morse Code • A sends message to B text on Mobile phone RULES No speaking, but B may nod after each letter or word. Once B thinks he understands the message he must tell A what he understands Record time from start of transmission to understanding the message

  15. Messages • Give examples of messages that are sent in everyday life today. • Explain and discuss • Importance • Reasons for secrecy and security • How is security achieved? • Accuracy requirements. • How do today’s messages differ from yesterday’s messages? • Technology used • Social requirements • Spam and advertising

  16. Reflection Questions • What was one thing you liked about this lesson plan? • What is its main weakness if any? • What should be included to bring in technology used in our modern society? • How would you modify the instructions to improve the experience of participants? • How would you use it in the classroom?

More Related