Interfacing Switch with Arduino

1. Why would Tisha connect a switch to an Arduino?

• a) To control the switch's color

• b) To predict the switch's behavior

• c) To create music with the switch

• d) To detect when the switch is pressed or released

2. How does a switch work with an Arduino?

• a) It predicts the Arduino's state
• b) It changes the Arduino's programming language
• c) It creates a connection when pressed and breaks the connection when released
• d) It controls the Arduino's power supply

3. What is the purpose of a pull-up resistor when connecting a button to a Raspberry Pi?

• a) To pull the button down

• b) To pull the button up

• c) To change the button's shape

• d) To predict the button's future actions

4. How is a button connected to an Arduino?

• a) By predicting the button's shape
• b) By using a special button cable
• c) By connecting one side of the button to an Arduino pin and the other side to ground
• d) By measuring the button's weight

5. Which Arduino function is used to read the state of a digital input pin connected to a switch?

• a) analogRead()
• b) digitalWrite()
• c) switchRead()
• d) digitalRead()

6. In a classroom setting, what does the digitalRead() function return when the switch is pressed?

• a) The switch's color

• b) "On"

• c) 1

• d) HIGH

7. How can you eliminate false readings from a switch due to electrical noise?

• a) By predicting the noise's source
• b) By changing the switch's size
• c) By using a pull-up or pull-down resistor
• d) By changing the switch's position

8. How can you debounce a switch to prevent multiple readings from a single press?

• a) By predicting the switch's bounce rate
• b) By using special debouncing cables
• c) By adding a delay or using software techniques
• d) By measuring the switch's height

What is the default state of a light switch when turned off?

• a) On

• b) Off

• c) Depends on the type of bulb connected

• d) Not specified

10. How can you ensure stable operation when interfacing a switch with Arduino in a noisy classroom environment?

• a) By predicting the noise's frequency

• b) By using noise-cancelling headphones

• c) By adding hardware and software debounce mechanisms and proper grounding

• d) By changing the switch's position