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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 899 · 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.

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

Answer key

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

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