← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 450 · 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 button: pressed or not? (a) digital (b) analog
  2. 2.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  3. 3.📶 A pin set LOW gives about … (a) 5 V (b) 9 V (c) 1.5 V (d) 0 V
  4. 4.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  5. 5.Which of these is an input? (a) a servo motor (b) a motor (c) a water pump (d) a temperature sensor
  6. 6.🔍 Which is the odd one out? (a) a motion sensor (b) a keypad (c) a water pump (d) a sound sensor
  7. 7.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  8. 8.Which of these is an input? (a) a small display (b) a motor (c) a push button (d) a servo motor
  9. 9.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 0 V (c) 5 V (d) 230 V
  10. 10.Which of these is an input? (a) a motor (b) an LED (c) a light sensor (d) a speaker
  11. 11.📶 A pin that reads a push button is set as … (a) an input (b) a battery (c) a resistor (d) an output
  12. 12.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  13. 13.📶 How many states can a digital pin have? (a) one (b) two (c) ten (d) a thousand
  14. 14.True or false: “the room temperature” is an analog signal. (a) True (b) False
  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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  16. 16.📶 Digital or analog: the room temperature? (a) analog (b) digital
  17. 17.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  18. 18.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  19. 19.Which of these is an output? (a) a motor (b) a temperature sensor (c) a keypad (d) a light sensor
  20. 20.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  21. 21.🔍 Which is the odd one out? (a) a temperature sensor (b) a servo motor (c) a motor (d) a small display
  22. 22.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  23. 23.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  24. 24.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  25. 25.Which of these is an output? (a) a push button (b) a keypad (c) a motion sensor (d) a buzzer
  26. 26.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  27. 27.📶 Digital or analog: many values in a range? (a) digital (b) analog
  28. 28.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  29. 29.🔍 Which is the odd one out? (a) a sound sensor (b) a motor (c) a buzzer (d) a small display
  30. 30.🔍 Which is the odd one out? (a) a buzzer (b) a light sensor (c) a speaker (d) a motor
  31. 31.🔍 Which is the odd one out? (a) a sound sensor (b) a keypad (c) a motion sensor (d) an LED
  32. 32.🔍 Which is the odd one out? (a) a keypad (b) a buzzer (c) an LED (d) a servo motor
  33. 33.💡 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 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  35. 35.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  36. 36.True or false: “many values in a range” is a digital signal. (a) False (b) True
  37. 37.True or false: “the room temperature” is a digital signal. (a) False (b) True
  38. 38.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  39. 39.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  40. 40.True or false: “how loud a sound is” is a digital signal. (a) True (b) False

Answer key

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

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