Micro:bit Variables and Selection Quiz

Micro:bit Revision Guide for Assessment

• The assessment includes a practical element requiring coding tasks.
• Refer to your OneNote for specific tasks.
• Complete tasks in the makecode editor.

Variables

• Variables are assigned a value, given a descriptive name, and can store numbers or text.
• Variables can change throughout a program.

Using Variables

• Variables can be assigned a starting value.
• The value can be accessed and displayed within a loop.
• Variable names should be meaningful for better understanding.

Selection (if/else)

• Selection uses if/else if/else statements.
• The first true condition activates the associated block of code.
• Else if and else conditions are skipped if a preceding condition is true.
• Conditions must evaluate to true or false.

Testing Multiple Conditions

• Multiple conditions can be combined in an ’if’ statement using the ‘and’ operator.

Inputs

• Inputs change a program's execution (e.g., button presses, sensor readings).
• Inputs affect program output.
• Programs actively listen for input changes.

Inputs: Sensors

• Sensors transform natural phenomena into numerical electrical signals.
• Sensor data range is typically 0-255 for the micro:bit.
• Sensors are used to measure phenomena such as light level or sound intensity.
• Data is collected/analysed using the input library.

Sensing the Real World

• Light sensors convert light energy into electrical signals.
• Analog to Digital Conversion (ADC): Translates physical levels into numbers.

Sound Levels

• Computers represent sound levels with numbers.
• Increasing wires connected to the microphone increase the level of detected sound wave amplitudes.

Math

• Ensure you are proficient with numerical calculations related to your sensor data.

Converting Celsius to Fahrenheit

• The formula to convert Celsius to Fahrenheit is: °F = 1.8°C + 32

Radio

• Learn how to create and use radio channels on the micro:bit.
• Emulators are helpful as tools.
• Refer to accompanying slides and tasks in OneNote.

Different Radio Channels

• Radio channels rely on different frequencies.
• Setting the same radio group makes them use the same frequency.
• Channels range from 1 to 255.

Sending and Receiving Data

• Set the radio channel and sending of data (e.g., button presses).
• Indicate receipt of data and display it (e.g., on screen).

Radio Range

• Determine the range of the micro-bit's radio transmission/reception (approximately 50cm).

Test your knowledge on using variables and selection statements in Micro:bit programming. This quiz covers variable assignments, meaningful names, and the if/else structure essential for coding tasks. Prepare for your assessment by mastering these concepts.