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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 838 · 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.📶 A pin set LOW gives about … (a) 1.5 V (b) 5 V (c) 0 V (d) 9 V
  2. 2.🔌 Is a speaker an input or an output for a microcontroller? (a) input (b) output
  3. 3.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  4. 4.📶 Digital or analog: the room temperature? (a) digital (b) analog
  5. 5.True or false: “a knob turned part way” is a digital signal. (a) True (b) False
  6. 6.🔍 Which is the odd one out? (a) a temperature sensor (b) a speaker (c) a motion sensor (d) a push button
  7. 7.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 5 V (c) 50 V (d) 0 V
  8. 8.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  9. 9.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input
  10. 10.💡 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) ON (b) OFF
  11. 11.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  12. 12.🔍 Which is the odd one out? (a) a motion sensor (b) a light sensor (c) a keypad (d) a buzzer
  13. 13.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  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 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  16. 16.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  17. 17.📶 How many states can a digital pin have? (a) ten (b) one (c) two (d) a thousand
  18. 18.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  19. 19.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  20. 20.💡 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) OFF (b) ON
  21. 21.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  22. 22.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  23. 23.💡 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
  24. 24.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  25. 25.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  26. 26.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  27. 27.🔍 Which is the odd one out? (a) a turning knob (b) a small display (c) a keypad (d) a motion sensor
  28. 28.True or false: “the room temperature” is a digital signal. (a) False (b) True
  29. 29.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  30. 30.Which of these is an input? (a) a buzzer (b) a water pump (c) a motor (d) a sound sensor
  31. 31.Which of these is an input? (a) a servo motor (b) a buzzer (c) an LED (d) a light sensor
  32. 32.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  33. 33.Which of these is an input? (a) a water pump (b) a temperature sensor (c) a buzzer (d) a servo motor
  34. 34.🔍 Which is the odd one out? (a) a push button (b) a servo motor (c) a temperature sensor (d) a motion sensor
  35. 35.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 LOW
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.Which of these is an input? (a) a speaker (b) an LED (c) a small display (d) a motion sensor
  37. 37.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  38. 38.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  39. 39.📶 A pin that reads a push button is set as … (a) an input (b) an output (c) a resistor (d) a battery
  40. 40.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog

Answer key

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

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