← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 575 · 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 temperature sensor (b) a motor (c) a speaker (d) a small display
  2. 2.🔍 Which is the odd one out? (a) a water pump (b) a turning knob (c) a servo motor (d) a buzzer
  3. 3.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  4. 4.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  5. 5.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  6. 6.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  7. 7.🔍 Which is the odd one out? (a) a light sensor (b) a temperature sensor (c) a push button (d) a buzzer
  8. 8.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  9. 9.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  10. 10.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  11. 11.🔍 Which is the odd one out? (a) a temperature sensor (b) a turning knob (c) a small display (d) a sound sensor
  12. 12.🔍 Which is the odd one out? (a) a sound sensor (b) a light sensor (c) a water pump (d) a motion sensor
  13. 13.💡 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 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  14. 14.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.📶 A pin set LOW gives about … (a) 9 V (b) 5 V (c) 1.5 V (d) 0 V
  16. 16.💡 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
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  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
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  18. 18.📶 A pin that reads a push button is set as … (a) an input (b) a battery (c) an output (d) a resistor
  19. 19.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  20. 20.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    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
  21. 21.True or false: “the room temperature” is an analog signal. (a) False (b) True
  22. 22.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  23. 23.True or false: “a knob turned part way” is a digital signal. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) a keypad (b) a turning knob (c) an LED (d) a temperature sensor
  25. 25.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  26. 26.Which of these is an input? (a) a servo motor (b) a light sensor (c) an LED (d) a buzzer
  27. 27.True or false: “a button: pressed or not” is a digital signal. (a) True (b) False
  28. 28.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  29. 29.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  30. 30.Which of these is an output? (a) a speaker (b) a light sensor (c) a temperature sensor (d) a push button
  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 8 LOW
    set pin 8 LOW
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.💡 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 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  33. 33.📶 How many states can a digital pin have? (a) ten (b) one (c) two (d) a thousand
  34. 34.💡 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
    set pin 7 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 temperature sensor (c) a motion sensor (d) a motor
  36. 36.🔍 Which is the odd one out? (a) a motor (b) a small display (c) a buzzer (d) a keypad
  37. 37.True or false: “how bright a room is” is an analog signal. (a) True (b) False
  38. 38.Which of these is an input? (a) a water pump (b) a small display (c) a keypad (d) an LED
  39. 39.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  40. 40.Which of these is an output? (a) a turning knob (b) a servo motor (c) a temperature sensor (d) a light sensor

Answer key

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

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