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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 402 · 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.📶 Digital or analog: the room temperature? (a) analog (b) digital
  2. 2.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  3. 3.💡 An LED (with its resistor) is on pin 8. 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
  4. 4.Which of these is an input? (a) a sound sensor (b) a buzzer (c) a small display (d) a motor
  5. 5.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  6. 6.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  7. 7.Which of these is an output? (a) an LED (b) a sound sensor (c) a push button (d) a keypad
  8. 8.True or false: “many values in a range” is an analog signal. (a) False (b) True
  9. 9.Which of these is an input? (a) a motor (b) a buzzer (c) a servo motor (d) a push button
  10. 10.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  11. 11.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  12. 12.Which of these is an output? (a) a push button (b) a light sensor (c) a turning knob (d) a servo motor
  13. 13.💡 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
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.🔍 Which is the odd one out? (a) a small display (b) an LED (c) a buzzer (d) a sound sensor
  15. 15.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  16. 16.🔍 Which is the odd one out? (a) a temperature sensor (b) a light sensor (c) a servo motor (d) a motion sensor
  17. 17.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  18. 18.💡 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 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  19. 19.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 230 V (c) 50 V (d) 0 V
  20. 20.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  21. 21.Which of these is an input? (a) a servo motor (b) a motion sensor (c) a water pump (d) a small display
  22. 22.Which of these is an input? (a) a small display (b) a water pump (c) an LED (d) a turning knob
  23. 23.True or false: “the room temperature” is an analog signal. (a) True (b) False
  24. 24.Which of these is an output? (a) a speaker (b) a light sensor (c) a motion sensor (d) a turning knob
  25. 25.True or false: “how bright a room is” is an analog signal. (a) False (b) True
  26. 26.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  27. 27.Which of these is an output? (a) a light sensor (b) a push button (c) a buzzer (d) a motion sensor
  28. 28.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input
  29. 29.🔌 Is a sound sensor an input or an output for a microcontroller? (a) input (b) output
  30. 30.🔍 Which is the odd one out? (a) a light sensor (b) a buzzer (c) a temperature sensor (d) a sound sensor
  31. 31.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  32. 32.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  33. 33.True or false: “many values in a range” is a digital signal. (a) False (b) True
  34. 34.Which of these is an input? (a) a keypad (b) a servo motor (c) an LED (d) a speaker
  35. 35.💡 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 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  37. 37.📶 How many states can a digital pin have? (a) one (b) ten (c) two (d) a thousand
  38. 38.📶 A pin set LOW gives about … (a) 5 V (b) 0 V (c) 1.5 V (d) 9 V
  39. 39.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 LOW
    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
  40. 40.🔍 Which is the odd one out? (a) a motor (b) a temperature sensor (c) a speaker (d) a buzzer

Answer key

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

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