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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 610 · 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 door: open or shut? (a) digital (b) analog
  2. 2.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  3. 3.🔍 Which is the odd one out? (a) a water pump (b) a temperature sensor (c) a keypad (d) a sound sensor
  4. 4.Which of these is an output? (a) a temperature sensor (b) a turning knob (c) a motion sensor (d) a water pump
  5. 5.Which of these is an input? (a) an LED (b) a buzzer (c) a turning knob (d) a small display
  6. 6.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  7. 7.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  8. 8.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  9. 9.📶 A pin that reads a push button is set as … (a) a resistor (b) a battery (c) an output (d) an input
  10. 10.🔍 Which is the odd one out? (a) a turning knob (b) an LED (c) a motor (d) a buzzer
  11. 11.💡 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
  12. 12.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  13. 13.📶 A pin set LOW gives about … (a) 9 V (b) 5 V (c) 0 V (d) 1.5 V
  14. 14.Which of these is an output? (a) a push button (b) a sound sensor (c) a buzzer (d) a keypad
  15. 15.Which of these is an input? (a) a keypad (b) a water pump (c) a speaker (d) an LED
  16. 16.📶 Digital or analog: the room temperature? (a) analog (b) digital
  17. 17.Which of these is an input? (a) a small display (b) a water pump (c) an LED (d) a light sensor
  18. 18.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 230 V (c) 5 V (d) 50 V
  19. 19.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  20. 20.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  21. 21.💡 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 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.True or false: “many values in a range” is an analog signal. (a) False (b) True
  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 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.📶 How many states can a digital pin have? (a) one (b) ten (c) a thousand (d) two
  25. 25.Which of these is an output? (a) a small display (b) a turning knob (c) a push button (d) a temperature sensor
  26. 26.💡 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
  27. 27.💡 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 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  28. 28.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  29. 29.Which of these is an input? (a) a small display (b) a sound sensor (c) an LED (d) a speaker
  30. 30.True or false: “how bright a room is” is a digital signal. (a) False (b) True
  31. 31.📶 Digital or analog: many values in a range? (a) analog (b) digital
  32. 32.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  33. 33.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  34. 34.💡 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 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.🔍 Which is the odd one out? (a) a sound sensor (b) a motion sensor (c) a push button (d) a small display
  36. 36.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  37. 37.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  38. 38.🔍 Which is the odd one out? (a) a speaker (b) a turning knob (c) a keypad (d) a push button
  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
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  40. 40.Which of these is an input? (a) a water pump (b) a push button (c) a small display (d) an LED

Answer key

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

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