Logic Gates AND, OR, and NOT


Definition of Boolean Algebra: a system of algebra in which there are only two possible values for a variable (often expressed as true and false or as 1 and 0) and in which the basic operations are the logical operations AND and OR.

From <https://www.merriam-webster.com/dictionary/Boolean%20algebra>

Uses binary system (o and 1)

0=off or false

1= on or true

AND Gate

  • 2 or more inputs and 1 output

  • All inputs have to be true for the output to be true

  • Symbol /\

Example:

  • My name is Billy Jo and I am wearing a top hat.

  • My name is Billy Jo and I am a boy.

  • My name is Zach and I am wearing a top hat.

  • My name is Zach and I am a boy.

OR Gate

  • 2 or more inputs and 1 output

  • One input has to be true for the output to be true

  • Symbol V

Example:

  • My name is Billy Jo and I am wearing a top hat.

  • My name is Billy Jo and I am a boy.

  • My name is Zach and I am wearing a top hat.

  • My name is Zach and I am a boy.

NOT Gate

  • 1 input and 1 output

  • Negates the input or original value

  • Symbol -

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