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Binary and Logic L6 - ASCII to represent Text

Last updated 10 months ago
10 questions
Lesson intentions To know that text can be represented in binary
Success Criteria:
1: Know that computers use standards
2: to convert to and from ASCII
3: Be aware about other character sets such as Unicode.
Standards: Something that is widely used by everyone so that everyone can find it easy to use and adapt. Such as a keyboard layout, cables, and knowing what combination of number represent which characters.

ASCII (American Standard Code for Information Interchange) is a standard character encoding used in telecommunication. The ASCII pronounced ‘ask-ee’, uses seven-bits which can represent 128 characters.
ASCII codes are used to represent alphanumeric data.

When we talk about ASCII, we usally refer to "Extended ASCII" - which uses 8-bits. So 256 characters can be represented.

Unicode is another character set. It uses 16 bits.
Unicode can represent over 65,000 characters from different languages and scripts. We have loads of space left which is now being used to store emojis.
1

Match the keyword to the definition

Draggable itemCorresponding Item
Extended ASCII
Something that is widely used and accepted by everyone
Unicode
A character set that uses 7-bits (128 Characters)
Standard
A character set that uses 8-bits (256 Characters)
ASCII
A character set that uses 16-bits (65 536 Characters)
ASCII Table:
Spaces are included to help it be read easier. Each letter is represented by 8-bit binary number.
1

What is the ASCII code for the letter "A"

1

What is the ASCII code for a space " "

1

What is the message?
01001000 01100101 01101100 01101100 01101111 00100000 01011001 01100101 01100001 01110010 00100000 00110111 00100001

1

What is the message?
01001001 00100000 01101100 01101111 01110110 01100101 00100000 01000011 01101111 01101101 01110000 01110101 01110100 01100101 01110010 00100000 01010011 01100011 01101001 01100101 01101110 01100011 01100101 00101110

0

Create your secret message in binary here:

1

Revision:
What is the denary number 26 in binary?

1

Revision:
What is the denary number 35 in binary?

1

What is
01011 +10100

1

Go onto
https://learncomputing.org/binary
and do some revision for converting binary to denary or vise versa
or some binary addition.
Screenshot your progress.