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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 645 · 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 small display (b) a motor (c) a light sensor (d) a servo motor
  2. 2.🔍 Which is the odd one out? (a) a keypad (b) a motion sensor (c) a temperature sensor (d) an LED
  3. 3.Which of these is an output? (a) a push button (b) a motion sensor (c) a keypad (d) a servo motor
  4. 4.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  5. 5.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  6. 6.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 5 V (c) 230 V (d) 50 V
  7. 7.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  8. 8.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  9. 9.🔍 Which is the odd one out? (a) a buzzer (b) a servo motor (c) a small display (d) a turning knob
  10. 10.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  11. 11.Which of these is an input? (a) a small display (b) a motor (c) a buzzer (d) a turning knob
  12. 12.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  13. 13.🔍 Which is the odd one out? (a) a temperature sensor (b) a keypad (c) a push button (d) a motor
  14. 14.📶 A pin that reads a push button is set as … (a) an output (b) an input (c) a battery (d) a resistor
  15. 15.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  16. 16.True or false: “many values in a range” is a digital signal. (a) True (b) False
  17. 17.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  18. 18.💡 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
  19. 19.📶 How many states can a digital pin have? (a) a thousand (b) ten (c) one (d) two
  20. 20.📶 A pin set LOW gives about … (a) 1.5 V (b) 9 V (c) 5 V (d) 0 V
  21. 21.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.🔍 Which is the odd one out? (a) a water pump (b) a motion sensor (c) a motor (d) an LED
  23. 23.💡 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
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  24. 24.💡 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 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  25. 25.🔍 Which is the odd one out? (a) a keypad (b) a light sensor (c) a turning knob (d) a servo motor
  26. 26.🔍 Which is the odd one out? (a) a water pump (b) a push button (c) a motor (d) a small display
  27. 27.💡 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 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.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  29. 29.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  30. 30.💡 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
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  31. 31.💡 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
  32. 32.Which of these is an output? (a) a water pump (b) a turning knob (c) a light sensor (d) a keypad
  33. 33.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  34. 34.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  35. 35.🔍 Which is the odd one out? (a) a light sensor (b) a water pump (c) a sound sensor (d) a motion sensor
  36. 36.💡 An LED (with its resistor) is on pin 8. 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
  37. 37.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  38. 38.True or false: “the room temperature” is an analog signal. (a) True (b) False
  39. 39.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  40. 40.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 HIGH
    set pin 7 LOW
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON

Answer key

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

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