WOKWI: STATE CHANGE DETECTION Y9

What is state change detection?

• Detecting when an input changes from one state to another

• Constantly monitoring an input

• Reading analog signals

• Measuring voltage fluctuations

Why is state change detection important?

• It increases processing time

• It decreases button lifespan

• It reduces the need to continuously monitor inputs

• It makes circuits more expensive

Which component is used to detect state changes in the circuit?

• Resistor

• Pushbutton

• Capacitor

• Diode

What happens when a button transitions from OFF to ON?

• The circuit resets

• The microcontroller turns off

• A state change is detected

• Nothing happens

Which microcontroller is used in this lesson?

• Micro:bit

• Raspberry Pi Pico

• ESP32

• Arduino Uno

Which pin is the pushbutton connected to in the circuit?

• GP0

• GP5

• GP2

• GP7

What does a pull-up resistor do?

• Keeps the button signal HIGH when not pressed

• Reduces current

• Turns the LED on

• Increases voltage

What is the typical value of a pull-up resistor?

• 100Ω

• 1kΩ

• 220Ω

• 10kΩ

What is the role of a resistor in an LED circuit?

• Increases brightness

• Limits current to prevent LED burnout

• Turns the LED on

• Stores energy

What is the typical resistor value for an LED?

• 1MΩ

• 10kΩ

• 220Ω - 330Ω

• 100Ω