How to Make a Code Wheel

Create a code wheel to easily translate between letters using a Cesar Cipher.

Steps

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    You need two concentric circles (one circle should be larger than the other). Punch a hole in the middle of both and attach with a brass fastener so the top wheel (the smaller one) can move independent of the bottom wheel.
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    Drawing over the entire circle, divide into 26 sections. Use a protractor to get each segment the same size -- they should be about 13.8 degrees each
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    Write the letters of the alphabet, in order, on both circles.
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    To use, determine a number to use a cipher, for example: 4.
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    Turn the inner wheel that number of turns (so A >> E, B >> F, etc). When writing the letter, look at the inner wheel and write down the letter that is matched on the outer wheel.
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    For additional complexity, use a cipher that changes on each letter (such as the digits of pi or the numerical digits of a sentence).

Things You'll Need

  • scissors
  • 2 paper plates or construction paper
  • a crayon, pencil or marker
  • paper piercer
  • a brad
  • a ruler.

Article Info

Categories: Codes and Hidden Messaging