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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 686 · 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.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 5 V (c) 50 V (d) 230 V
  2. 2.🔌 Is a motion sensor 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 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  4. 4.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  5. 5.📶 Digital or analog: many values in a range? (a) digital (b) analog
  6. 6.🔍 Which is the odd one out? (a) a servo motor (b) a small display (c) a push button (d) an LED
  7. 7.Which of these is an input? (a) an LED (b) a motor (c) a water pump (d) a light sensor
  8. 8.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  9. 9.🔍 Which is the odd one out? (a) a push button (b) a keypad (c) a small display (d) a sound sensor
  10. 10.🔍 Which is the odd one out? (a) an LED (b) a water pump (c) a servo motor (d) a temperature sensor
  11. 11.🔍 Which is the odd one out? (a) a buzzer (b) a sound sensor (c) a motion sensor (d) a turning knob
  12. 12.Which of these is an output? (a) a servo motor (b) a keypad (c) a push button (d) a sound sensor
  13. 13.🔍 Which is the odd one out? (a) a sound sensor (b) a light sensor (c) a motor (d) a temperature sensor
  14. 14.True or false: “a knob turned part way” is a digital signal. (a) True (b) False
  15. 15.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  16. 16.Which of these is an output? (a) a light sensor (b) a temperature sensor (c) a motor (d) a turning knob
  17. 17.🔍 Which is the odd one out? (a) a speaker (b) a small display (c) a servo motor (d) a light sensor
  18. 18.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  19. 19.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  20. 20.💡 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 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  21. 21.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.💡 An LED (with its resistor) is on pin 7. 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) OFF (b) ON
  23. 23.💡 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 7 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.💡 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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  25. 25.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  26. 26.Which of these is an input? (a) a speaker (b) a water pump (c) a small display (d) a push button
  27. 27.Which of these is an output? (a) a light sensor (b) a push button (c) a temperature sensor (d) a speaker
  28. 28.🔍 Which is the odd one out? (a) a light sensor (b) a keypad (c) a speaker (d) a push button
  29. 29.Which of these is an input? (a) a speaker (b) a small display (c) a motor (d) a keypad
  30. 30.True or false: “many values in a range” is an analog signal. (a) False (b) True
  31. 31.🔍 Which is the odd one out? (a) a small display (b) a water pump (c) a speaker (d) a sound sensor
  32. 32.🔍 Which is the odd one out? (a) an LED (b) a temperature sensor (c) a push button (d) a keypad
  33. 33.🔍 Which is the odd one out? (a) a small display (b) a water pump (c) a turning knob (d) an LED
  34. 34.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  35. 35.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  36. 36.Which of these is an input? (a) a motion sensor (b) a small display (c) an LED (d) a water pump
  37. 37.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.🔍 Which is the odd one out? (a) a water pump (b) a motion sensor (c) a push button (d) a keypad
  39. 39.📶 Digital or analog: the room temperature? (a) digital (b) analog
  40. 40.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog

Answer key

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

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