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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 713 · 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 of these is an output? (a) a buzzer (b) a light sensor (c) a temperature sensor (d) a keypad
  2. 2.Which of these is an output? (a) a keypad (b) an LED (c) a temperature sensor (d) a sound sensor
  3. 3.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  4. 4.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  5. 5.🔍 Which is the odd one out? (a) a small display (b) a keypad (c) a light sensor (d) a push button
  6. 6.Which of these is an input? (a) an LED (b) a temperature sensor (c) a motor (d) a water pump
  7. 7.🔍 Which is the odd one out? (a) a motor (b) a small display (c) a buzzer (d) a sound sensor
  8. 8.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  9. 9.💡 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
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  10. 10.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  11. 11.True or false: “how bright a room is” is a digital signal. (a) False (b) True
  12. 12.🔍 Which is the odd one out? (a) a water pump (b) a motion sensor (c) a temperature sensor (d) a light sensor
  13. 13.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  14. 14.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  15. 15.Which of these is an output? (a) a light sensor (b) a small display (c) a turning knob (d) a keypad
  16. 16.🔍 Which is the odd one out? (a) a motor (b) a push button (c) a speaker (d) a buzzer
  17. 17.Which of these is an input? (a) a buzzer (b) a push button (c) an LED (d) a motor
  18. 18.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  19. 19.Which of these is an output? (a) a motion sensor (b) a sound sensor (c) a servo motor (d) a turning knob
  20. 20.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  21. 21.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  22. 22.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.🔍 Which is the odd one out? (a) a sound sensor (b) a motion sensor (c) a buzzer (d) a temperature sensor
  24. 24.🔍 Which is the odd one out? (a) an LED (b) a water pump (c) a small display (d) a light sensor
  25. 25.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  26. 26.True or false: “how bright a room is” is an analog signal. (a) True (b) False
  27. 27.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  28. 28.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  29. 29.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 50 V (c) 230 V (d) 0 V
  30. 30.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  33. 33.📶 A pin that reads a push button is set as … (a) a resistor (b) an input (c) an output (d) a battery
  34. 34.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  35. 35.📶 Digital or analog: many values in a range? (a) analog (b) digital
  36. 36.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  37. 37.Which of these is an output? (a) a turning knob (b) a light sensor (c) a motor (d) a temperature sensor
  38. 38.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  39. 39.🔍 Which is the odd one out? (a) a motion sensor (b) an LED (c) a buzzer (d) a speaker
  40. 40.💡 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 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF

Answer key

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

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