Global Challenge Flashing Wheels Lesson 2

Your challenge Create a flashing wheel light solution for your user

Criteria must be: flashing light that can be easily attached to a wheel appealing to your user simple to use inexpensive to make

Learning objectives: to design a flashing wheel light solution to meet a user’s needs. to create a paper prototype to write a detailed, accurate algorithm using pseudocode To include iteration, loops and selection in algorithms To test and debug algorithms

User persona Sarah is 11 years old and a wheelchair user. Her favourite colour is purple, her favourite band is The 1975 and her favourite animals are pandas. She goes to school in Manchester and gets the bus most of the way. She has to push herself, or a friend pushes her, to and from the bus into/out of school and she has to cross a fairly busy road.

Potential flashing wheel solution for Sarah: small wheelchair light(s) that are easily: carried in her bag attached to the wheels turned on & off replaced flash (with adjustable speed) automatically sense when is dark can play her favourite music are purple have some kind of panda (sticker?) on them

Prototyping An initial, basic version of an innovation. It allows you to quickly and easily: show how your innovation would work test and trial it get feedback decide what works and what doesn’t

Paper Prototyping Draw your solution Give it a name Annotate it with information about the device

Algorithm a sequence of instructions or rules to solve a problem written for a person to follow to write code Pseudocode A simple way of describing an algorithm No specific syntax (programming language)

Sarah’s Flashing Wheels algorithm 1 START Sense darkness level IF dark then OUTPUT light 1 second pause 1 second REPEAT ELSE, REPEAT

Sarah’s Flashing Wheels Algorithm 2 When START button pressed OUTPUT ‘on’ audio sound INPUT Sense IF dark IF dark then OUTPUT light 1 second Pause 1 second Repeat until STOP button pressed ELSE, do nothing When STOP button pressed OUTPUT ‘off’ sound STOP

Iteration Loops Selection The repetition of a sequence A form of iteration repeat until a certain condition is met Selection a decision to be made according to whether a condition is met If, then, else

Criteria must be: flashing light that can be easily attached to a wheel appealing to your user simple to use inexpensive to make

Learning objectives: to design a flashing wheel light solution to meet a user’s needs. to decompose a problem into smaller, component parts to create a paper prototype to write a detailed, accurate algorithm using pseudocode To include iteration, loops and selection in algorithms To test and debug algorithms