← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 503 · 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 of these is an input? (a) a motor (b) a servo motor (c) a light sensor (d) a buzzer
  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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  3. 3.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  4. 4.📶 Digital or analog: the room temperature? (a) digital (b) analog
  5. 5.💡 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 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  6. 6.🔍 Which is the odd one out? (a) a turning knob (b) a keypad (c) a temperature sensor (d) a water pump
  7. 7.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    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
  8. 8.🔍 Which is the odd one out? (a) a push button (b) a motor (c) a water pump (d) a servo motor
  9. 9.💡 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 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  10. 10.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  11. 11.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  12. 12.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  13. 13.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  14. 14.📶 A pin set LOW gives about … (a) 1.5 V (b) 5 V (c) 0 V (d) 9 V
  15. 15.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  16. 16.True or false: “how bright a room is” is an analog signal. (a) False (b) True
  17. 17.📶 How many states can a digital pin have? (a) two (b) ten (c) one (d) a thousand
  18. 18.📶 A pin that reads a push button is set as … (a) a battery (b) an output (c) a resistor (d) an input
  19. 19.🔍 Which is the odd one out? (a) a temperature sensor (b) a motion sensor (c) a speaker (d) a keypad
  20. 20.📶 Digital or analog: how loud a sound is? (a) analog (b) digital
  21. 21.Which of these is an output? (a) a turning knob (b) a push button (c) a temperature sensor (d) a buzzer
  22. 22.Which of these is an output? (a) a temperature sensor (b) a small display (c) a motion sensor (d) a push button
  23. 23.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 230 V (c) 5 V (d) 50 V
  24. 24.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  25. 25.Which of these is an input? (a) an LED (b) a speaker (c) a water pump (d) a turning knob
  26. 26.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  27. 27.True or false: “many values in a range” is an analog signal. (a) False (b) True
  28. 28.🔌 Is a sound sensor an input or an output for a microcontroller? (a) input (b) output
  29. 29.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  30. 30.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  31. 31.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  32. 32.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 LOW
    set pin 7 LOW
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  33. 33.💡 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 8 LOW
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  35. 35.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  36. 36.🔍 Which is the odd one out? (a) a speaker (b) a motion sensor (c) a small display (d) an LED
  37. 37.🔍 Which is the odd one out? (a) a buzzer (b) a speaker (c) a small display (d) a light sensor
  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 HIGH
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.True or false: “a knob turned part way” is a digital signal. (a) True (b) False
  40. 40.💡 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 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON

Answer key

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

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