← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 189 · 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 motor (b) a small display (c) a light sensor (d) an LED
  2. 2.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  3. 3.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  4. 4.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  5. 5.True or false: “many values in a range” is a digital signal. (a) False (b) True
  6. 6.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  7. 7.Which of these is an input? (a) a motor (b) a servo motor (c) a buzzer (d) a push button
  8. 8.🔍 Which is the odd one out? (a) a buzzer (b) a small display (c) a speaker (d) a temperature sensor
  9. 9.📶 A pin set LOW gives about … (a) 0 V (b) 5 V (c) 9 V (d) 1.5 V
  10. 10.🔍 Which is the odd one out? (a) an LED (b) a temperature sensor (c) a sound sensor (d) a motion sensor
  11. 11.🔍 Which is the odd one out? (a) a turning knob (b) a sound sensor (c) a keypad (d) a small display
  12. 12.Which of these is an input? (a) a small display (b) a servo motor (c) a buzzer (d) a temperature sensor
  13. 13.🔌 Is a water pump 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 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  15. 15.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 5 V (c) 230 V (d) 0 V
  16. 16.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  17. 17.Which of these is an input? (a) a servo motor (b) a sound sensor (c) a small display (d) a speaker
  18. 18.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  19. 19.🔍 Which is the odd one out? (a) a push button (b) a turning knob (c) a motion sensor (d) a servo motor
  20. 20.Which of these is an input? (a) a small display (b) a water pump (c) a turning knob (d) a servo motor
  21. 21.💡 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 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  22. 22.True or false: “a knob turned part way” is a digital signal. (a) False (b) True
  23. 23.🔌 Is a speaker an input or an output for a microcontroller? (a) input (b) output
  24. 24.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  25. 25.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  26. 26.True or false: “the room temperature” is a digital signal. (a) False (b) True
  27. 27.Which of these is an input? (a) a small display (b) a speaker (c) a water pump (d) a light sensor
  28. 28.True or false: “how loud a sound is” is an analog signal. (a) False (b) True
  29. 29.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  30. 30.True or false: “how bright a room is” is an analog signal. (a) True (b) False
  31. 31.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  32. 32.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  33. 33.🔍 Which is the odd one out? (a) a push button (b) a keypad (c) a water pump (d) a light sensor
  34. 34.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  35. 35.Which of these is an input? (a) a water pump (b) a speaker (c) a buzzer (d) a keypad
  36. 36.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  37. 37.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  38. 38.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.Which of these is an input? (a) a motor (b) a small display (c) an LED (d) a motion sensor
  40. 40.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital

Answer key

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

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