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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 993 · 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.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  2. 2.💡 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 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  3. 3.Which of these is an input? (a) a speaker (b) a buzzer (c) a turning knob (d) a servo motor
  4. 4.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  5. 5.True or false: “a door: open or shut” is a digital signal. (a) True (b) False
  6. 6.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  7. 7.🔍 Which is the odd one out? (a) a push button (b) a buzzer (c) a servo motor (d) a motor
  8. 8.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  9. 9.True or false: “HIGH or LOW only” is an analog signal. (a) False (b) True
  10. 10.📶 A pin set LOW gives about … (a) 1.5 V (b) 9 V (c) 0 V (d) 5 V
  11. 11.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  12. 12.🔍 Which is the odd one out? (a) a push button (b) a temperature sensor (c) a motion sensor (d) a motor
  13. 13.🔍 Which is the odd one out? (a) a motion sensor (b) a servo motor (c) a turning knob (d) a push button
  14. 14.🔌 Is a sound sensor an input or an output for a microcontroller? (a) input (b) output
  15. 15.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  16. 16.Which of these is an input? (a) an LED (b) a buzzer (c) a speaker (d) a temperature sensor
  17. 17.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  18. 18.🔍 Which is the odd one out? (a) a turning knob (b) a servo motor (c) a small display (d) a water pump
  19. 19.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  20. 20.🔍 Which is the odd one out? (a) a turning knob (b) a push button (c) a small display (d) a motion sensor
  21. 21.📶 Digital or analog: the room temperature? (a) analog (b) digital
  22. 22.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  23. 23.🔍 Which is the odd one out? (a) a speaker (b) an LED (c) a water pump (d) a keypad
  24. 24.True or false: “how loud a sound is” is a digital signal. (a) True (b) False
  25. 25.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  26. 26.Which of these is an output? (a) a push button (b) a speaker (c) a keypad (d) a turning knob
  27. 27.💡 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
  28. 28.True or false: “the room temperature” is an analog signal. (a) False (b) True
  29. 29.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  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 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  31. 31.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  32. 32.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  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 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.Which of these is an output? (a) a light sensor (b) a keypad (c) a temperature sensor (d) a small display
  35. 35.Which of these is an output? (a) a temperature sensor (b) a turning knob (c) an LED (d) a keypad
  36. 36.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 50 V (c) 0 V (d) 230 V
  37. 37.💡 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
    set pin 8 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  39. 39.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  40. 40.Which of these is an output? (a) a buzzer (b) a temperature sensor (c) a turning knob (d) a light sensor

Answer key

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

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