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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 583 · 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.🔍 Which is the odd one out? (a) a temperature sensor (b) a sound sensor (c) a motion sensor (d) a small display
  2. 2.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  3. 3.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  4. 4.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  5. 5.🔍 Which is the odd one out? (a) a motor (b) an LED (c) a light sensor (d) a small display
  6. 6.🔍 Which is the odd one out? (a) a speaker (b) a keypad (c) a water pump (d) a motor
  7. 7.True or false: “the room temperature” is an analog signal. (a) False (b) True
  8. 8.📶 How many states can a digital pin have? (a) ten (b) two (c) one (d) a thousand
  9. 9.🔍 Which is the odd one out? (a) a speaker (b) a servo motor (c) a sound sensor (d) an LED
  10. 10.📶 Digital or analog: the room temperature? (a) digital (b) analog
  11. 11.🔍 Which is the odd one out? (a) a water pump (b) an LED (c) a buzzer (d) a motion sensor
  12. 12.💡 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
  13. 13.True or false: “a knob turned part way” is a digital signal. (a) True (b) False
  14. 14.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  15. 15.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  16. 16.Which of these is an output? (a) a light sensor (b) a push button (c) a sound sensor (d) a servo motor
  17. 17.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  18. 18.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  19. 19.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  20. 20.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 0 V (c) 230 V (d) 50 V
  21. 21.True or false: “the room temperature” is a digital signal. (a) False (b) True
  22. 22.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  23. 23.Which of these is an input? (a) a buzzer (b) an LED (c) a keypad (d) a servo motor
  24. 24.Which of these is an output? (a) a keypad (b) a motor (c) a turning knob (d) a temperature sensor
  25. 25.Which of these is an output? (a) a buzzer (b) a turning knob (c) a temperature sensor (d) a sound sensor
  26. 26.🔍 Which is the odd one out? (a) a motor (b) a water pump (c) a push button (d) a buzzer
  27. 27.📶 A pin set LOW gives about … (a) 5 V (b) 9 V (c) 0 V (d) 1.5 V
  28. 28.🔍 Which is the odd one out? (a) a temperature sensor (b) an LED (c) a speaker (d) a buzzer
  29. 29.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  30. 30.True or false: “many values in a range” is an analog signal. (a) False (b) True
  31. 31.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  33. 33.💡 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
  34. 34.True or false: “a button: pressed or not” is a digital signal. (a) True (b) False
  35. 35.💡 An LED (with its resistor) is on pin 7. 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) OFF (b) ON
  36. 36.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  37. 37.🔍 Which is the odd one out? (a) a push button (b) a light sensor (c) a keypad (d) a speaker
  38. 38.True or false: “how loud a sound is” is a digital signal. (a) True (b) False
  39. 39.📶 Digital or analog: many values in a range? (a) analog (b) digital
  40. 40.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF

Answer key

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

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