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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 629 · 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) digital (b) analog
  2. 2.Which of these is an input? (a) a motor (b) a water pump (c) a speaker (d) a sound sensor
  3. 3.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  4. 4.💡 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
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  5. 5.True or false: “a knob turned part way” is a digital signal. (a) False (b) True
  6. 6.🔍 Which is the odd one out? (a) a speaker (b) a light sensor (c) a water pump (d) a servo motor
  7. 7.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input
  8. 8.📶 How many states can a digital pin have? (a) one (b) a thousand (c) two (d) ten
  9. 9.🔍 Which is the odd one out? (a) a buzzer (b) a servo motor (c) an LED (d) a turning knob
  10. 10.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  11. 11.Which of these is an output? (a) a turning knob (b) a push button (c) a water pump (d) a light sensor
  12. 12.Which of these is an input? (a) a small display (b) an LED (c) a buzzer (d) a temperature sensor
  13. 13.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  14. 14.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  15. 15.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  16. 16.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  17. 17.📶 A pin set LOW gives about … (a) 5 V (b) 1.5 V (c) 0 V (d) 9 V
  18. 18.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  19. 19.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  20. 20.🔍 Which is the odd one out? (a) a small display (b) a buzzer (c) a push button (d) an LED
  21. 21.True or false: “how bright a room is” is a digital signal. (a) False (b) True
  22. 22.🔍 Which is the odd one out? (a) a small display (b) a buzzer (c) an LED (d) a keypad
  23. 23.True or false: “how loud a sound is” is an analog signal. (a) False (b) True
  24. 24.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  25. 25.💡 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
  26. 26.True or false: “many values in a range” is a digital signal. (a) False (b) True
  27. 27.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  28. 28.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  29. 29.Which of these is an output? (a) a light sensor (b) a motor (c) a motion sensor (d) a turning knob
  30. 30.💡 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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  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 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 50 V (c) 0 V (d) 5 V
  33. 33.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  34. 34.True or false: “many values in a range” is an analog signal. (a) False (b) True
  35. 35.💡 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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.🔍 Which is the odd one out? (a) a water pump (b) a light sensor (c) a push button (d) a keypad
  37. 37.📶 A pin that reads a push button is set as … (a) an input (b) a battery (c) a resistor (d) an output
  38. 38.True or false: “how bright a room is” is an analog signal. (a) True (b) False
  39. 39.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 HIGH
    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
  40. 40.🔍 Which is the odd one out? (a) a sound sensor (b) a servo motor (c) a turning knob (d) a motion sensor

Answer key

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

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