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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 330 · 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: many values in a range? (a) analog (b) digital
  2. 2.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  3. 3.🔍 Which is the odd one out? (a) a speaker (b) a small display (c) a servo motor (d) a turning knob
  4. 4.Which of these is an output? (a) a keypad (b) a temperature sensor (c) a speaker (d) a light sensor
  5. 5.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  6. 6.Which of these is an output? (a) an LED (b) a temperature sensor (c) a sound sensor (d) a push button
  7. 7.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  8. 8.📶 A pin that reads a push button is set as … (a) an output (b) a resistor (c) a battery (d) an input
  9. 9.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  10. 10.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  11. 11.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  12. 12.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  13. 13.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.🔍 Which is the odd one out? (a) a small display (b) a water pump (c) a sound sensor (d) a buzzer
  15. 15.Which of these is an input? (a) a small display (b) a keypad (c) a water pump (d) a speaker
  16. 16.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 230 V (c) 50 V (d) 0 V
  17. 17.📶 How many states can a digital pin have? (a) ten (b) one (c) a thousand (d) two
  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 LOW
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  19. 19.True or false: “many values in a range” is a digital signal. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) a buzzer (b) a small display (c) a light sensor (d) a water pump
  21. 21.🔍 Which is the odd one out? (a) a buzzer (b) a motor (c) an LED (d) a keypad
  22. 22.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  23. 23.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  25. 25.💡 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
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  26. 26.📶 Digital or analog: the room temperature? (a) digital (b) analog
  27. 27.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  28. 28.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  29. 29.Which of these is an output? (a) a motor (b) a light sensor (c) a motion sensor (d) a push button
  30. 30.Which of these is an input? (a) a light sensor (b) a servo motor (c) a motor (d) a speaker
  31. 31.💡 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 7 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  33. 33.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  35. 35.True or false: “the room temperature” is an analog signal. (a) False (b) True
  36. 36.💡 An LED (with its resistor) is on pin 8. 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) OFF (b) ON
  37. 37.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.🔍 Which is the odd one out? (a) a motor (b) a temperature sensor (c) a speaker (d) a buzzer
  39. 39.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  40. 40.🔍 Which is the odd one out? (a) a buzzer (b) a small display (c) a motion sensor (d) a motor

Answer key

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

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