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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 618 · 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.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  2. 2.📶 A pin set LOW gives about … (a) 5 V (b) 9 V (c) 1.5 V (d) 0 V
  3. 3.📶 Digital or analog: many values in a range? (a) analog (b) digital
  4. 4.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  5. 5.Which of these is an output? (a) a keypad (b) a servo motor (c) a sound sensor (d) a light sensor
  6. 6.Which of these is an input? (a) a push button (b) a speaker (c) a small display (d) a servo motor
  7. 7.📶 How many states can a digital pin have? (a) two (b) a thousand (c) one (d) ten
  8. 8.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 LOW
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  9. 9.🔍 Which is the odd one out? (a) a buzzer (b) a motion sensor (c) an LED (d) a motor
  10. 10.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  11. 11.🔍 Which is the odd one out? (a) a temperature sensor (b) a speaker (c) a sound sensor (d) a motion sensor
  12. 12.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  13. 13.🔍 Which is the odd one out? (a) a temperature sensor (b) a water pump (c) a servo motor (d) a motor
  14. 14.Which of these is an output? (a) a speaker (b) a keypad (c) a motion sensor (d) a turning knob
  15. 15.Which of these is an input? (a) a temperature sensor (b) an LED (c) a small display (d) a water pump
  16. 16.True or false: “HIGH or LOW only” is an analog signal. (a) False (b) True
  17. 17.📶 A pin that reads a push button is set as … (a) an input (b) a resistor (c) a battery (d) an output
  18. 18.🔍 Which is the odd one out? (a) a push button (b) a temperature sensor (c) a water pump (d) a motion sensor
  19. 19.🔍 Which is the odd one out? (a) a light sensor (b) an LED (c) a motor (d) a servo motor
  20. 20.Which of these is an output? (a) a keypad (b) a sound sensor (c) an LED (d) a motion sensor
  21. 21.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  22. 22.🔍 Which is the odd one out? (a) a turning knob (b) a speaker (c) a small display (d) a water pump
  23. 23.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  24. 24.🔍 Which is the odd one out? (a) a keypad (b) a buzzer (c) a light sensor (d) a push button
  25. 25.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  26. 26.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  27. 27.True or false: “a button: pressed or not” is a digital signal. (a) True (b) False
  28. 28.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  29. 29.🔍 Which is the odd one out? (a) a sound sensor (b) a keypad (c) a motor (d) a temperature sensor
  30. 30.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  31. 31.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.True or false: “how bright a room is” is an analog signal. (a) False (b) True
  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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  34. 34.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  35. 35.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 0 V (c) 50 V (d) 230 V
  36. 36.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  37. 37.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  38. 38.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  39. 39.Which of these is an input? (a) a light sensor (b) a motor (c) a buzzer (d) a servo motor
  40. 40.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output

Answer key

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

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