← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 880 · 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.🔍 Which is the odd one out? (a) a turning knob (b) a water pump (c) a light sensor (d) a push button
  2. 2.Which of these is an input? (a) a motor (b) a light sensor (c) a buzzer (d) a servo motor
  3. 3.Which of these is an output? (a) a light sensor (b) a turning knob (c) a motor (d) a keypad
  4. 4.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  5. 5.Which of these is an output? (a) a sound sensor (b) a push button (c) a water pump (d) a keypad
  6. 6.True or false: “many values in a range” is a digital signal. (a) True (b) False
  7. 7.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  8. 8.💡 An LED (with its resistor) is on pin 8. 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) OFF (b) ON
  9. 9.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  10. 10.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  11. 11.Which of these is an output? (a) a servo motor (b) a keypad (c) a turning knob (d) a light sensor
  12. 12.Which of these is an output? (a) a light sensor (b) a turning knob (c) a push button (d) a small display
  13. 13.💡 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
  14. 14.🔍 Which is the odd one out? (a) a water pump (b) a speaker (c) a sound sensor (d) a servo motor
  15. 15.📶 Digital or analog: many values in a range? (a) digital (b) analog
  16. 16.🔍 Which is the odd one out? (a) a light sensor (b) a motor (c) a sound sensor (d) a push button
  17. 17.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  18. 18.Which of these is an input? (a) a keypad (b) a speaker (c) a servo motor (d) a small display
  19. 19.🔍 Which is the odd one out? (a) an LED (b) a motion sensor (c) a light sensor (d) a turning knob
  20. 20.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  21. 21.📶 A pin that reads a push button is set as … (a) a resistor (b) an input (c) an output (d) a battery
  22. 22.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  23. 23.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  24. 24.💡 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) ON (b) OFF
  25. 25.🔍 Which is the odd one out? (a) a servo motor (b) a push button (c) a temperature sensor (d) a light sensor
  26. 26.Which of these is an input? (a) a temperature sensor (b) a motor (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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  28. 28.Which of these is an output? (a) a sound sensor (b) an LED (c) a push button (d) a light sensor
  29. 29.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  30. 30.Which of these is an input? (a) an LED (b) a speaker (c) a push button (d) a water pump
  31. 31.💡 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 8 HIGH
    set pin 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.🔍 Which is the odd one out? (a) a buzzer (b) a water pump (c) a light sensor (d) a motor
  33. 33.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.📶 A pin set LOW gives about … (a) 9 V (b) 5 V (c) 0 V (d) 1.5 V
  36. 36.Which of these is an input? (a) a small display (b) a speaker (c) a sound sensor (d) a motor
  37. 37.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  38. 38.📶 How many states can a digital pin have? (a) ten (b) a thousand (c) one (d) two
  39. 39.📶 Digital or analog: the room temperature? (a) analog (b) digital
  40. 40.🔍 Which is the odd one out? (a) a motor (b) a buzzer (c) an LED (d) a turning knob

Answer key

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

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