Text representation in binary – ASCII
  1. How does ASCII work?
  2. What are the advantages of ASCII?
  3. What are the disadvantages of ASCII?

Have a go at writing your name in Morse code!

(Click on the image to make it bigger)

morsecode

Extension – What fictional characters are famous for these lines?

Line 1

-.. — ….

Line 2

.-.. ..- -.- . / .. / .- — / -.– — ..- .-. / ..-. .- – …. . .-.

Line 3

. .-.. . — . -. – .- .-. -.– / — -.– / -.. . .- .-. / .– .- – … — -.

Key Definition – ASCII

ic_action_edit American Standard Code for Information Interchange (ASCII) is a system where each letter, number and character is represented by a number. Standard ASCII uses up to 128 numbers, Extended ASCII up to 256.

Challenge 1 – Write your name in numbers

Using the ASCII Code sheet, can you write out your full name in numbers?

Example:

M r   W e s t
77 114 32 87 101 115 116

 


Challenge 2 – Write your name in Binary.

Can you translate you name from numbers in to 8 bit binary?

M r   W e s t
77 114 32 87 101 115 116
01001101 01110010 100000 01010111 1100101 1110011 1110100

 


Challenge 3 -Write a secret messsage to a friend in binary.

Write a secret message to a friend on a piece of paper and then get that friend to decode the message!

 

Advantages

Can you think of any advantages of ASCII? Have a think and then click the tab below to see how many you have quessed!

Advantages
  • Easy to understand and convert manually from binary to letters and vice-versa if you need to.
  • Space efficient – each letter only uses 8 bits ( 1 Byte)

Disadvangtages

Can you think of any disadvantages of ASCII? Click below to see how many you guess right!

Disadvantages
  • Limited support for special characters
  • Only supports Roman alphabet ( No Chinese, Cyrillic, Arabic, etc)

homework.01

You should complete the assignment “Text representation in Binary Quiz”

 

 

 

 

 

YouTube Binary to ASCII Video – Easy trick for converting from binary to ASCII

Youtube Binary Metal Video – Great for an intro