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pxt-calliope/docs/reference/js/lessons/love-meter.md
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love meter lesson

create a love meter with the BBC micro:bit #pin #pressed #string #if #var #pause #show #docs

@video td/videos/love-meter-0

Topic

On Pin Pressed

Quick Links

Class

Year 7

Prior learning/place of lesson in scheme of work

Learn how to use the pins pin pressed, input->on pin pressed to run code when the user holds the GND pin with one hand, and presses pin 0 with the other hand, thus completing a circuit. We will be learning how to create a love meter using input on pin pressed, a local variable, math random, If (conditional) as well as simple commands, such as show number, pause, and show string.

Documentation

Objectives

  • learn how to run code when the user holds the GND pin in one hand, and presses pin 0 with the other hand, thus completing a circuit; when you run a script with this function in a web browser, click pin 0 on the simulator
  • learn how to a create a variable for a place where you can store and retrieve data
  • learn how Boolean operators take Boolean inputs and evaluates to a Boolean output
  • learn how to return a random number
  • learn how to show a number on the LED screen
  • learn how to pause your code for the specified number of milliseconds
  • learn how to conditionally run code depending on whether a condition is true or not
  • learn how to show a string on the LED screen one character at a time (scrolling from left to right)

Progression Pathways / Computational Thinking Framework

Algorithms

  • Designs solutions (algorithms) that use repetition and two-way selection, ie if, then and else.(AL)
  • Uses diagrams to express solutions.(AB)
  • Uses logical reasoning to predict outputs, showing an awareness of inputs (AL)
  • Designs solutions by decomposing a problem and creates a sub-solution for each of these parts. (DE) (AL) (AB)
  • Represents solutions using a structured notation (AL) (AB)

Programming & Development

  • Creates programs that implement algorithms to achieve given goals (AL)
  • Declares and assigns variables(AB)
  • Understands the difference between, and appropriately uses if and if, then and else statements(AL)
  • Uses a variable and relational operators within a loop to govern termination (AL) (GE)
  • Uses a range of operators and expressions e.g. Boolean, and applies them in the context of program control. (AL)
  • Selects the appropriate data types(AL) (AB

Data & Data Representation

  • Understands the difference between data and information(AB)
  • Uses filters or can perform single criteria searches for information.(AL)
  • Performs more complex searches for information e.g. using Boolean and relational operators(AL) (GE) (EV)
  • Defines data types: real numbers and Boolean (AB)

Hardware & Processing

  • Knows that computers collect data from various input devices, including sensors and application software (AB)
  • Demonstrates responsible use of technologies and online services, and knows a range of ways to report concerns Understands how search engines rank search results (AL)

Information Technology

  • Collects, organizes, and presents data and information in digital content (AB)
  • Makes appropriate improvements to solutions based on feedback received, and can comment on the success of the solution (EV)
  • Makes judgements about digital content when evaluating and repurposing it for a given audience (EV) (GE)
  • Recognises ethical issues surrounding the application of information technology beyond school.

Computational Thinking Concept: AB = Abstraction; DE = Decomposition; AL = Algorithmic Thinking; EV = Evaluation; GE = Generalisation

Activity

Extended Activity

Homework