← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 711 · 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.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  2. 2.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  3. 3.📶 A pin set LOW gives about … (a) 1.5 V (b) 5 V (c) 0 V (d) 9 V
  4. 4.📶 How many states can a digital pin have? (a) a thousand (b) two (c) one (d) ten
  5. 5.📶 A pin that reads a push button is set as … (a) a resistor (b) an input (c) an output (d) a battery
  6. 6.True or false: “the room temperature” is a digital signal. (a) False (b) True
  7. 7.🔍 Which is the odd one out? (a) a motor (b) a light sensor (c) a turning knob (d) a keypad
  8. 8.🔌 Is a sound sensor an input or an output for a microcontroller? (a) input (b) output
  9. 9.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  10. 10.🔍 Which is the odd one out? (a) a sound sensor (b) a temperature sensor (c) a turning knob (d) a small display
  11. 11.Which of these is an input? (a) a servo motor (b) a motor (c) a water pump (d) a temperature sensor
  12. 12.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  13. 13.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  14. 14.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  15. 15.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  16. 16.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 5 V (c) 230 V (d) 50 V
  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 7 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  18. 18.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  19. 19.💡 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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  20. 20.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  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 7 LOW
    set pin 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.Which of these is an input? (a) an LED (b) a motor (c) a turning knob (d) a servo motor
  23. 23.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  24. 24.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  25. 25.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  26. 26.🔍 Which is the odd one out? (a) a light sensor (b) a water pump (c) a small display (d) an LED
  27. 27.📶 Digital or analog: the room temperature? (a) analog (b) digital
  28. 28.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  29. 29.Which of these is an output? (a) a temperature sensor (b) a sound sensor (c) a speaker (d) a light sensor
  30. 30.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  31. 31.True or false: “the room temperature” is an analog signal. (a) True (b) False
  32. 32.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  33. 33.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  34. 34.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  35. 35.🔍 Which is the odd one out? (a) a push button (b) a motion sensor (c) a turning knob (d) a speaker
  36. 36.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  37. 37.💡 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 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.Which of these is an input? (a) a motor (b) a servo motor (c) a motion sensor (d) a buzzer
  39. 39.Which of these is an output? (a) a sound sensor (b) a buzzer (c) a light sensor (d) a turning knob
  40. 40.🔍 Which is the odd one out? (a) an LED (b) a temperature sensor (c) a small display (d) a motor

Answer key

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

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