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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 648 · 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: “many values in a range” is an analog signal. (a) True (b) False
  2. 2.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  3. 3.💡 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) ON (b) OFF
  4. 4.True or false: “a knob turned part way” is a digital signal. (a) False (b) True
  5. 5.🔍 Which is the odd one out? (a) a keypad (b) a push button (c) a water pump (d) a motion sensor
  6. 6.💡 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
  7. 7.🔍 Which is the odd one out? (a) a light sensor (b) an LED (c) a speaker (d) a motor
  8. 8.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  9. 9.Which of these is an input? (a) a servo motor (b) a small display (c) a water pump (d) a motion sensor
  10. 10.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  11. 11.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 0 V (c) 5 V (d) 230 V
  12. 12.📶 A pin set LOW gives about … (a) 5 V (b) 0 V (c) 9 V (d) 1.5 V
  13. 13.Which of these is an output? (a) a push button (b) an LED (c) a light sensor (d) a turning knob
  14. 14.💡 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) OFF (b) ON
  15. 15.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  16. 16.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  17. 17.🔍 Which is the odd one out? (a) an LED (b) a keypad (c) a buzzer (d) a small display
  18. 18.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  19. 19.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  20. 20.🔍 Which is the odd one out? (a) a push button (b) a motion sensor (c) a buzzer (d) a keypad
  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 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  22. 22.True or false: “the room temperature” is an analog signal. (a) False (b) True
  23. 23.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  24. 24.🔍 Which is the odd one out? (a) a speaker (b) a sound sensor (c) a motion sensor (d) a light sensor
  25. 25.Which of these is an input? (a) an LED (b) a sound sensor (c) a buzzer (d) a speaker
  26. 26.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  27. 27.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  28. 28.💡 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
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  29. 29.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  30. 30.🔍 Which is the odd one out? (a) a servo motor (b) a small display (c) a water pump (d) a push button
  31. 31.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  32. 32.📶 Digital or analog: the room temperature? (a) digital (b) analog
  33. 33.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) a servo motor (b) a light sensor (c) a keypad (d) a temperature sensor
  35. 35.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  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 7 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  37. 37.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  38. 38.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  39. 39.🔍 Which is the odd one out? (a) a push button (b) a light sensor (c) a motor (d) a temperature sensor
  40. 40.True or false: “the room temperature” is a digital signal. (a) True (b) False

Answer key

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

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