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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 59 · 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.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  3. 3.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  4. 4.🔍 Which is the odd one out? (a) a motor (b) a speaker (c) an LED (d) a keypad
  5. 5.Which of these is an input? (a) a speaker (b) an LED (c) a servo motor (d) a push button
  6. 6.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  7. 7.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  8. 8.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  9. 9.💡 An LED (with its resistor) is on pin 7. 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
  10. 10.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  11. 11.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  12. 12.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  13. 13.True or false: “the room temperature” is an analog signal. (a) False (b) True
  14. 14.🔍 Which is the odd one out? (a) an LED (b) a motion sensor (c) a push button (d) a light sensor
  15. 15.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  16. 16.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  17. 17.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  18. 18.Which of these is an input? (a) a small display (b) an LED (c) a servo motor (d) a motion sensor
  19. 19.🔍 Which is the odd one out? (a) a servo motor (b) a light sensor (c) a motion sensor (d) a keypad
  20. 20.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  21. 21.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  22. 22.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  24. 24.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  25. 25.Which of these is an output? (a) a motion sensor (b) a light sensor (c) a buzzer (d) a sound sensor
  26. 26.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 0 V (c) 5 V (d) 50 V
  27. 27.💡 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) ON (b) OFF
  28. 28.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  29. 29.Which of these is an output? (a) a temperature sensor (b) a water pump (c) a turning knob (d) a push button
  30. 30.💡 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
    set pin 7 HIGH
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  31. 31.Which of these is an input? (a) a buzzer (b) a motor (c) an LED (d) a turning knob
  32. 32.Which of these is an input? (a) a motor (b) an LED (c) a buzzer (d) a keypad
  33. 33.💡 An LED (with its resistor) is on pin 7. 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) OFF (b) ON
  34. 34.🔍 Which is the odd one out? (a) a small display (b) a servo motor (c) a push button (d) an LED
  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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  37. 37.🔍 Which is the odd one out? (a) a push button (b) a turning knob (c) a small display (d) a sound sensor
  38. 38.📶 Digital or analog: the room temperature? (a) analog (b) digital
  39. 39.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  40. 40.🔍 Which is the odd one out? (a) a motor (b) a keypad (c) a light sensor (d) a temperature sensor

Answer key

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

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