← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 357 · 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 servo motor an input or an output for a microcontroller? (a) input (b) output
  2. 2.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  3. 3.📶 Digital or analog: many values in a range? (a) digital (b) analog
  4. 4.🔍 Which is the odd one out? (a) a turning knob (b) a light sensor (c) a push button (d) a speaker
  5. 5.Which of these is an input? (a) a motor (b) a water pump (c) a push button (d) a buzzer
  6. 6.Which of these is an output? (a) a motion sensor (b) a light sensor (c) a small display (d) a sound sensor
  7. 7.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  8. 8.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  9. 9.Which of these is an input? (a) an LED (b) a speaker (c) a keypad (d) a motor
  10. 10.💡 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 7 HIGH
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  11. 11.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  12. 12.📶 How many states can a digital pin have? (a) two (b) a thousand (c) one (d) ten
  13. 13.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  14. 14.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 230 V (c) 5 V (d) 0 V
  15. 15.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  16. 16.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input
  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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  18. 18.Which of these is an input? (a) a servo motor (b) a buzzer (c) an LED (d) a motion sensor
  19. 19.🔍 Which is the odd one out? (a) a servo motor (b) a speaker (c) a motion sensor (d) a small display
  20. 20.True or false: “how bright a room is” is an analog signal. (a) False (b) True
  21. 21.🔌 Is a sound sensor an input or an output for a microcontroller? (a) input (b) output
  22. 22.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  23. 23.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 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
  24. 24.True or false: “a knob turned part way” is an analog signal. (a) True (b) False
  25. 25.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  26. 26.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  27. 27.🔍 Which is the odd one out? (a) a buzzer (b) a keypad (c) a temperature sensor (d) a push button
  28. 28.💡 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) ON (b) OFF
  29. 29.💡 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
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  30. 30.🔍 Which is the odd one out? (a) a keypad (b) a sound sensor (c) a temperature sensor (d) an LED
  31. 31.🔍 Which is the odd one out? (a) a sound sensor (b) a water pump (c) a light sensor (d) a push button
  32. 32.🔍 Which is the odd one out? (a) a buzzer (b) a servo motor (c) a temperature sensor (d) a speaker
  33. 33.Which of these is an output? (a) a light sensor (b) a temperature sensor (c) a buzzer (d) a motion sensor
  34. 34.📶 A pin set LOW gives about … (a) 0 V (b) 1.5 V (c) 5 V (d) 9 V
  35. 35.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  36. 36.💡 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
  37. 37.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  38. 38.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 LOW
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  40. 40.🔍 Which is the odd one out? (a) a turning knob (b) a light sensor (c) a small display (d) a sound sensor

Answer key

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

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