← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 428 · 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 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  2. 2.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  3. 3.🔍 Which is the odd one out? (a) a motor (b) a buzzer (c) a motion sensor (d) a speaker
  4. 4.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  5. 5.Which of these is an input? (a) a servo motor (b) a buzzer (c) a small display (d) a turning knob
  6. 6.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  7. 7.Which of these is an input? (a) an LED (b) a water pump (c) a small display (d) a light sensor
  8. 8.📶 How many states can a digital pin have? (a) two (b) a thousand (c) ten (d) one
  9. 9.🔍 Which is the odd one out? (a) a buzzer (b) a sound sensor (c) an LED (d) a speaker
  10. 10.Which of these is an output? (a) a push button (b) a sound sensor (c) a water pump (d) a light sensor
  11. 11.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  12. 12.🔍 Which is the odd one out? (a) a keypad (b) a sound sensor (c) a water pump (d) a temperature sensor
  13. 13.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  14. 14.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  16. 16.True or false: “a button: pressed or not” is a digital signal. (a) True (b) False
  17. 17.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 5 V (c) 0 V (d) 230 V
  18. 18.Which of these is an output? (a) a keypad (b) a motor (c) a motion sensor (d) a turning knob
  19. 19.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  20. 20.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  21. 21.🔍 Which is the odd one out? (a) a motor (b) a push button (c) a temperature sensor (d) a sound sensor
  22. 22.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  24. 24.Which of these is an output? (a) a sound sensor (b) a keypad (c) a turning knob (d) a buzzer
  25. 25.True or false: “the room temperature” is an analog signal. (a) True (b) False
  26. 26.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  27. 27.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  28. 28.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  29. 29.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  30. 30.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  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 HIGH
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.💡 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
  33. 33.Which of these is an output? (a) a motion sensor (b) a speaker (c) a temperature sensor (d) a light sensor
  34. 34.📶 A pin that reads a push button is set as … (a) an input (b) a resistor (c) a battery (d) an output
  35. 35.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  36. 36.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  37. 37.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  38. 38.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  39. 39.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  40. 40.📶 A pin set LOW gives about … (a) 5 V (b) 9 V (c) 1.5 V (d) 0 V

Answer key

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

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