Binary Code

0100 0010 0110 1001 0110 1110 0110 0001 0111 0010 0111 1001 0010 0000 0100 0011 0110 1111 0110 0100 0110 0101

What is Binary Code?

• Code used to express digital information that computers process

• Consists of only 2 symbols– 0’s & 1’s

What is Binary Code?

• The 2 digits express the flow of electricity through transistors (or switches)

• Computers are made up of millions of electronic switches

What is Binary Code?

• Switch can be either OFF or ON• 0 = OFF• 1 = ON

What is Binary Code?

• Binary Digit BIT

• Each digit, a 1 or 0, is called a BIT

• 8 bits are called a BYTE

• 1 gigabyte ≈ 1 billion bytes ≈ 8 billion bits • http://youtu.be/ry1hpm1GXVI

Examples of 8-bit Binary Numbers

0100001001101111 0110100101100100011011100110 01010110000101110010011110010010000001000011

Practice

57 = _ _ _ _ _ _ _ _

32 = _ _ _ _ _ _ _ _

Practice

________ = 0110 1111

________ = 00010010

ASCII

• American Standard Code for Information Interchange

• Alphabet in Binary

• ASCII is an 8-bit code

Practice

• ASCII Code Sheet Handout

• Use what you’ve learned about Binary Numbers to complete the ASCII worksheet.

http://educate.intel.com/en/TheJourneyInside/ExploreTheCurriculum/EC_DigitalInformation/DILesson6/