ASCII and UTF-8

LEARN THE FUNDAMENTALS OF ASCII and UTF-8

ASCII and UTF-8 are two of the ways in which computers store letters and symbols using binary.

ASCII stands for the American Standard Code for Information Interchange. It’s a system used to represent English characters, and it was designed to encode 128 different characters.

Full Unicode

https://en.wikipedia.org/wiki/List_of_Unicode_characters

ASCII Converters

https://www.rapidtables.com/convert/number/ascii-hex-bin-dec-converter.html

Task 1

How ASCII Works

Here's the CS Field Guide Binary Card Simulator to help if needed.

Task 2

Decode Messages

Click the image to complete!

Task 3

ASCII Art Made By You!

The challenge is to make something original using symbols!

On the slide consider the overall design including colours & layout.

Click this link for the g.slide template

See below to help you get started

EoT BINARY & HEXADECIMAL ASSESSMENT

Complete the ASCII and UTF-8 End of Topic Quiz

FURTHER RESOURCES

ASCII ART TEXT GENERATOR

Check out this Ascii Text Generator

Create your name. Try different fonts. Click the 'Test All' button to see what happens.

Building an ASCII Translator

Use the spreadsheet to decode this secret ASCII code

01011001 01101111 01110101 00100000 01101000 01100001 01110110 01100101 00100000 01101110 01101111 01110111 00100000 01100101 01101110 01110100 01100101 01110010 01100101 01100100 00100000 01110100 01101000 01100101 00100000 01100100 01101001 01100111 01101001 01110100 01100001 01101100 00100000 01110100 01100101 01100011 01101000 01101110 01101111 01101100 01101111 01100111 01111001 00100000 01111010 01101111 01101110 01100101 00100001

After you have decoded it how could the spreadsheet be modified to encode messages?

Coding an ASCII Converter

If you know a bit of Python this tutorial is a good extension for you. (Click the image to get started).

You will get to run some Python code that can convert characters to numbers and back again.

Want a real challenge? In the end I challenge you to use this knowledge to encrypt/decrypt a message using a Caesar Cipher.

LINKS TO NZ CURRICULUM

Digital Technologies | Progress Outcomes

Computational thinking for digital technologies

At the end of this topic students will have had the opportunity to cover;

understand that digital devices store data using just two states represented by binary digits PO3
understand how computers store more complex types of data using binary digits PO5

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