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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 674 · 40 questions
TalentJR

Remember (Read in, drive out): Inputs: buttons, knobs, sensors. Outputs: LEDs, buzzers, motors, displays. Digital: HIGH (≈ 5 V) or LOW (0 V) only. Analog: any value in a range. Trace the program: only the LED’s own pin matters, and its last command decides ON or OFF.

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  1. 1.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  2. 2.True or false: “the room temperature” is a digital signal. (a) False (b) True
  3. 3.Which of these is an input? (a) a motor (b) a buzzer (c) a push button (d) a speaker
  4. 4.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  5. 5.True or false: “HIGH or LOW only” is an analog signal. (a) False (b) True
  6. 6.📶 A pin that reads a push button is set as … (a) a battery (b) an output (c) an input (d) a resistor
  7. 7.Which of these is an input? (a) a speaker (b) an LED (c) a light sensor (d) a small display
  8. 8.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  9. 9.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  10. 10.🔍 Which is the odd one out? (a) a small display (b) a buzzer (c) a speaker (d) a keypad
  11. 11.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  12. 12.📶 How many states can a digital pin have? (a) one (b) ten (c) a thousand (d) two
  13. 13.📶 A pin set LOW gives about … (a) 0 V (b) 5 V (c) 1.5 V (d) 9 V
  14. 14.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  15. 15.True or false: “a door: open or shut” is a digital signal. (a) True (b) False
  16. 16.🔍 Which is the odd one out? (a) a speaker (b) a temperature sensor (c) a servo motor (d) a small display
  17. 17.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  18. 18.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  19. 19.🔍 Which is the odd one out? (a) a light sensor (b) a small display (c) a motor (d) a buzzer
  20. 20.🔍 Which is the odd one out? (a) a light sensor (b) a push button (c) a keypad (d) a buzzer
  21. 21.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  22. 22.Which of these is an input? (a) a sound sensor (b) a speaker (c) a water pump (d) a buzzer
  23. 23.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 50 V (c) 230 V (d) 0 V
  24. 24.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  25. 25.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  26. 26.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  27. 27.📶 Digital or analog: many values in a range? (a) analog (b) digital
  28. 28.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  29. 29.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  30. 30.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  31. 31.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.🔍 Which is the odd one out? (a) a temperature sensor (b) an LED (c) a push button (d) a keypad
  33. 33.🔍 Which is the odd one out? (a) a sound sensor (b) a small display (c) a water pump (d) a motor
  34. 34.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  35. 35.🔍 Which is the odd one out? (a) a motor (b) an LED (c) a motion sensor (d) a servo motor
  36. 36.Which of these is an output? (a) a temperature sensor (b) a push button (c) a keypad (d) a motor
  37. 37.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  38. 38.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  39. 39.Which of these is an output? (a) a light sensor (b) a temperature sensor (c) a water pump (d) a keypad
  40. 40.🔍 Which is the odd one out? (a) a push button (b) a sound sensor (c) a keypad (d) a motor

Answer key

  1. input
  2. False
  3. a push button
  4. digital
  5. False
  6. an input
  7. a light sensor
  8. output
  9. ON
  10. a keypad
  11. output
  12. two
  13. 0 V
  14. True
  15. True
  16. a temperature sensor
  17. OFF
  18. OFF
  19. a light sensor
  20. a buzzer
  21. input
  22. a sound sensor
  23. 5 V
  24. ON
  25. True
  26. False
  27. analog
  28. OFF
  29. digital
  30. False
  31. OFF
  32. an LED
  33. a sound sensor
  34. True
  35. a motion sensor
  36. a motor
  37. ON
  38. digital
  39. a water pump
  40. a motor

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