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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 716 · 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.🔍 Which is the odd one out? (a) a keypad (b) a water pump (c) a servo motor (d) a buzzer
  2. 2.True or false: “how bright a room is” is an analog signal. (a) True (b) False
  3. 3.🔍 Which is the odd one out? (a) a turning knob (b) a motion sensor (c) a push button (d) a servo motor
  4. 4.Which of these is an input? (a) a small display (b) a servo motor (c) a speaker (d) a push button
  5. 5.True or false: “HIGH or LOW only” is an analog signal. (a) False (b) True
  6. 6.True or false: “many values in a range” is a digital signal. (a) True (b) False
  7. 7.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  8. 8.Which of these is an output? (a) a keypad (b) a water pump (c) a light sensor (d) a push button
  9. 9.Which of these is an input? (a) a light sensor (b) a speaker (c) a motor (d) a small display
  10. 10.True or false: “a button: pressed or not” is a digital signal. (a) True (b) False
  11. 11.📶 Digital or analog: the room temperature? (a) analog (b) digital
  12. 12.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  13. 13.📶 Digital or analog: many values in a range? (a) digital (b) analog
  14. 14.True or false: “how loud a sound is” is a digital signal. (a) True (b) False
  15. 15.Which of these is an output? (a) a keypad (b) a light sensor (c) an LED (d) a turning knob
  16. 16.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  17. 17.💡 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) OFF (b) ON
  18. 18.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  19. 19.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  20. 20.🔍 Which is the odd one out? (a) a sound sensor (b) a motion sensor (c) an LED (d) a keypad
  21. 21.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  22. 22.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  23. 23.🔍 Which is the odd one out? (a) a servo motor (b) a speaker (c) a water pump (d) a push button
  24. 24.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  25. 25.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  26. 26.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  27. 27.📶 A pin set LOW gives about … (a) 0 V (b) 5 V (c) 1.5 V (d) 9 V
  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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  29. 29.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  30. 30.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  31. 31.True or false: “the room temperature” is an analog signal. (a) True (b) False
  32. 32.💡 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 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  33. 33.💡 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
  34. 34.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  37. 37.🔍 Which is the odd one out? (a) a speaker (b) a water pump (c) a small display (d) a light sensor
  38. 38.Which of these is an output? (a) a buzzer (b) a temperature sensor (c) a keypad (d) a push button
  39. 39.Which of these is an input? (a) a speaker (b) a servo motor (c) a motion sensor (d) a buzzer
  40. 40.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input

Answer key

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

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