← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 746 · 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.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 0 V (c) 50 V (d) 230 V
  3. 3.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  4. 4.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  5. 5.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  6. 6.🔍 Which is the odd one out? (a) a speaker (b) a motor (c) a small display (d) a temperature sensor
  7. 7.True or false: “a knob turned part way” is a digital signal. (a) True (b) False
  8. 8.Which of these is an output? (a) a sound sensor (b) a buzzer (c) a light sensor (d) a temperature sensor
  9. 9.📶 A pin that reads a push button is set as … (a) an output (b) an input (c) a resistor (d) a battery
  10. 10.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  11. 11.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  12. 12.💡 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 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  13. 13.📶 Digital or analog: many values in a range? (a) analog (b) digital
  14. 14.True or false: “the room temperature” is an analog signal. (a) True (b) False
  15. 15.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  16. 16.Which of these is an input? (a) a servo motor (b) a buzzer (c) a keypad (d) a motor
  17. 17.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  18. 18.Which of these is an input? (a) a buzzer (b) a water pump (c) a turning knob (d) an LED
  19. 19.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  20. 20.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  21. 21.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  22. 22.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  23. 23.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) a small display (b) a keypad (c) a water pump (d) an LED
  25. 25.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  26. 26.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  27. 27.Which of these is an output? (a) a servo motor (b) a push button (c) a light sensor (d) a temperature sensor
  28. 28.🔍 Which is the odd one out? (a) a small display (b) a water pump (c) a sound sensor (d) a motor
  29. 29.💡 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 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  30. 30.Which of these is an input? (a) an LED (b) a servo motor (c) a push button (d) a motor
  31. 31.💡 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 LOW
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.🔍 Which is the odd one out? (a) a motion sensor (b) a motor (c) a push button (d) a light sensor
  33. 33.🔍 Which is the odd one out? (a) a motion sensor (b) a sound sensor (c) a small display (d) a light sensor
  34. 34.🔍 Which is the odd one out? (a) a motion sensor (b) a servo motor (c) a push button (d) a sound sensor
  35. 35.📶 A pin set LOW gives about … (a) 0 V (b) 1.5 V (c) 9 V (d) 5 V
  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 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  37. 37.🔍 Which is the odd one out? (a) a turning knob (b) a motion sensor (c) a light sensor (d) an LED
  38. 38.Which of these is an input? (a) a motion sensor (b) a buzzer (c) a motor (d) a speaker
  39. 39.📶 Digital or analog: the room temperature? (a) analog (b) digital
  40. 40.💡 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 8 LOW
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF

Answer key

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

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