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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 616 · 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 knob turned part way? (a) analog (b) digital
  2. 2.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  3. 3.Which of these is an output? (a) a light sensor (b) a push button (c) a motion sensor (d) a buzzer
  4. 4.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  5. 5.Which of these is an output? (a) a keypad (b) a motor (c) a push button (d) a light sensor
  6. 6.📶 Digital or analog: how loud a sound is? (a) analog (b) digital
  7. 7.📶 A pin that reads a push button is set as … (a) a resistor (b) a battery (c) an output (d) an input
  8. 8.🔍 Which is the odd one out? (a) an LED (b) a buzzer (c) a light sensor (d) a water pump
  9. 9.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  10. 10.True or false: “HIGH or LOW only” is an analog signal. (a) False (b) True
  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 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  12. 12.🔍 Which is the odd one out? (a) a speaker (b) a temperature sensor (c) a buzzer (d) an LED
  13. 13.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.True or false: “a knob turned part way” is a digital signal. (a) False (b) True
  16. 16.💡 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
  17. 17.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  18. 18.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  19. 19.💡 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 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  20. 20.True or false: “the room temperature” is an analog signal. (a) False (b) True
  21. 21.💡 An LED (with its resistor) is on pin 7. 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
  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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  25. 25.Which of these is an input? (a) a small display (b) a temperature sensor (c) a servo motor (d) a buzzer
  26. 26.📶 A pin set LOW gives about … (a) 0 V (b) 5 V (c) 9 V (d) 1.5 V
  27. 27.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  28. 28.Which of these is an output? (a) a sound sensor (b) a speaker (c) a motion sensor (d) a keypad
  29. 29.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  30. 30.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 5 V (c) 0 V (d) 230 V
  31. 31.Which of these is an input? (a) a motion sensor (b) an LED (c) a buzzer (d) a servo motor
  32. 32.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  33. 33.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  34. 34.💡 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
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.Which of these is an input? (a) a light sensor (b) a water pump (c) an LED (d) a servo motor
  36. 36.Which of these is an output? (a) a small display (b) a push button (c) a sound sensor (d) a light sensor
  37. 37.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  38. 38.True or false: “how bright a room is” is an analog signal. (a) False (b) True
  39. 39.Which of these is an input? (a) a push button (b) a motor (c) a small display (d) an LED
  40. 40.Which of these is an input? (a) a small display (b) a sound sensor (c) a buzzer (d) a motor

Answer key

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

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