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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 737 · 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.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 0 V (c) 5 V (d) 50 V
  2. 2.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  3. 3.Which of these is an input? (a) a light sensor (b) a buzzer (c) a motor (d) a water pump
  4. 4.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  5. 5.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  6. 6.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  7. 7.Which of these is an input? (a) a keypad (b) a buzzer (c) a water pump (d) a motor
  8. 8.True or false: “the room temperature” is a digital signal. (a) False (b) True
  9. 9.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  10. 10.🔍 Which is the odd one out? (a) a motor (b) a buzzer (c) a speaker (d) a push button
  11. 11.🔍 Which is the odd one out? (a) a speaker (b) a light sensor (c) a water pump (d) an LED
  12. 12.💡 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 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  13. 13.🔍 Which is the odd one out? (a) a push button (b) a keypad (c) a buzzer (d) a sound sensor
  14. 14.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  15. 15.💡 An LED (with its resistor) is on pin 8. 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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  16. 16.🔍 Which is the odd one out? (a) a temperature sensor (b) an LED (c) a buzzer (d) a motor
  17. 17.💡 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
  18. 18.True or false: “how bright a room is” is an analog signal. (a) False (b) True
  19. 19.🔍 Which is the odd one out? (a) a push button (b) a turning knob (c) an LED (d) a light sensor
  20. 20.📶 Digital or analog: how loud a sound is? (a) analog (b) digital
  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 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.Which of these is an input? (a) a motor (b) a servo motor (c) a sound sensor (d) a speaker
  23. 23.Which of these is an input? (a) a water pump (b) an LED (c) a buzzer (d) a turning knob
  24. 24.📶 How many states can a digital pin have? (a) a thousand (b) one (c) two (d) ten
  25. 25.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  26. 26.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  28. 28.📶 Digital or analog: the room temperature? (a) digital (b) analog
  29. 29.📶 A pin that reads a push button is set as … (a) an output (b) an input (c) a battery (d) a resistor
  30. 30.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  31. 31.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  32. 32.🔍 Which is the odd one out? (a) a temperature sensor (b) a keypad (c) a speaker (d) a push button
  33. 33.🔍 Which is the odd one out? (a) a servo motor (b) a buzzer (c) a small display (d) a keypad
  34. 34.💡 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 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  35. 35.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 LOW
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  37. 37.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  38. 38.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  39. 39.🔍 Which is the odd one out? (a) a light sensor (b) a push button (c) a small display (d) a motion sensor
  40. 40.Which of these is an output? (a) a servo motor (b) a push button (c) a temperature sensor (d) a light sensor

Answer key

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

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