The tutespark week 3. Three digital devices.

The tutespark this week was to find three digital devices that are not electronic that is used to communicate.

1: The first thing that I think about when I read this question is the Morse code.








2: I did some research online and I found something called the Braille a-system. It says that the braille system is a "tactile system of raised dots representing letters of the alphabet." This is the most effective system to contact the blind people. And the web page says it was invented in Paris by a man named Louis Braille.

http://www.cnib.ca/en/living/braille/braille-system/default.aspx
http://pmr-science.wikispaces.com/file/view/Braille.gif/32414381/Braille.gif






3: The last thing I found was the Sputnik. A russian satellite that was shot out to the space in the 1950s to gather information about the space.



http://en.wikipedia.org/wiki/Sputnik_1