← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 323 · 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.

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

Answer key

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

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids