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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 601 · 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.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  2. 2.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  3. 3.💡 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) OFF (b) ON
  4. 4.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  5. 5.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  6. 6.Which of these is an input? (a) a turning knob (b) a servo motor (c) a speaker (d) a buzzer
  7. 7.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  8. 8.Which of these is an input? (a) a servo motor (b) a keypad (c) a motor (d) a small display
  9. 9.Which of these is an output? (a) a motor (b) a keypad (c) a temperature sensor (d) a turning knob
  10. 10.Which of these is an output? (a) a light sensor (b) a push button (c) a speaker (d) a motion sensor
  11. 11.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  13. 13.True or false: “a door: open or shut” is a digital signal. (a) True (b) False
  14. 14.True or false: “the room temperature” is an analog signal. (a) True (b) False
  15. 15.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  16. 16.💡 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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  17. 17.True or false: “many values in a range” is an analog signal. (a) True (b) False
  18. 18.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  19. 19.💡 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
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  20. 20.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  21. 21.Which of these is an input? (a) a small display (b) a servo motor (c) a speaker (d) a sound sensor
  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
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  23. 23.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  24. 24.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  25. 25.📶 How many states can a digital pin have? (a) two (b) a thousand (c) ten (d) one
  26. 26.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  27. 27.📶 Digital or analog: the room temperature? (a) analog (b) digital
  28. 28.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  29. 29.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  30. 30.Which of these is an input? (a) a motor (b) a small display (c) a buzzer (d) a push button
  31. 31.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 0 V (c) 5 V (d) 50 V
  32. 32.🔍 Which is the odd one out? (a) a push button (b) a sound sensor (c) a servo motor (d) a light sensor
  33. 33.💡 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
  34. 34.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  35. 35.💡 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 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.📶 Digital or analog: many values in a range? (a) analog (b) digital
  37. 37.📶 A pin set LOW gives about … (a) 1.5 V (b) 5 V (c) 0 V (d) 9 V
  38. 38.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  39. 39.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  40. 40.Which of these is an output? (a) a small display (b) a keypad (c) a sound sensor (d) a temperature sensor

Answer key

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

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