← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 738 · 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 buzzer (b) a motor (c) a speaker (d) a turning knob
  2. 2.📶 Digital or analog: how loud a sound is? (a) analog (b) digital
  3. 3.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  4. 4.🔍 Which is the odd one out? (a) a keypad (b) a light sensor (c) a small display (d) a sound sensor
  5. 5.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  6. 6.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  7. 7.📶 How many states can a digital pin have? (a) ten (b) one (c) a thousand (d) two
  8. 8.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  9. 9.Which of these is an input? (a) a speaker (b) a small display (c) a push button (d) an LED
  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 7 HIGH
    set pin 8 HIGH
    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 motion sensor (b) a servo motor (c) a light sensor (d) a temperature sensor
  12. 12.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  13. 13.💡 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
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  16. 16.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 5 V (c) 50 V (d) 0 V
  17. 17.Which of these is an input? (a) a temperature sensor (b) a motor (c) a water pump (d) a small display
  18. 18.📶 A pin that reads a push button is set as … (a) an output (b) a resistor (c) a battery (d) an input
  19. 19.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  20. 20.True or false: “many values in a range” is an analog signal. (a) False (b) True
  21. 21.💡 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
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  22. 22.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.🔍 Which is the odd one out? (a) a buzzer (b) a motor (c) a push button (d) an LED
  24. 24.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  25. 25.🔍 Which is the odd one out? (a) a light sensor (b) a servo motor (c) a motor (d) a small display
  26. 26.🔍 Which is the odd one out? (a) a sound sensor (b) a motion sensor (c) a temperature sensor (d) an LED
  27. 27.💡 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
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  28. 28.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  29. 29.📶 Digital or analog: many values in a range? (a) analog (b) digital
  30. 30.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  31. 31.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  32. 32.💡 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) ON (b) OFF
  33. 33.🔍 Which is the odd one out? (a) a keypad (b) a turning knob (c) a push button (d) a motor
  34. 34.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  35. 35.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  36. 36.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  37. 37.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  38. 38.💡 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 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  39. 39.Which of these is an output? (a) a small display (b) a sound sensor (c) a light sensor (d) a push button
  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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON

Answer key

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

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