← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 801 · 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 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  2. 2.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  3. 3.🔍 Which is the odd one out? (a) a push button (b) a motion sensor (c) a light sensor (d) a motor
  4. 4.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  5. 5.🔍 Which is the odd one out? (a) a small display (b) a turning knob (c) a speaker (d) a servo motor
  6. 6.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  7. 7.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 230 V (c) 50 V (d) 5 V
  8. 8.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  9. 9.True or false: “many values in a range” is an analog signal. (a) True (b) False
  10. 10.💡 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 7 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  11. 11.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  12. 12.Which of these is an input? (a) a keypad (b) an LED (c) a speaker (d) a motor
  13. 13.True or false: “a knob turned part way” is a digital signal. (a) False (b) True
  14. 14.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  15. 15.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  16. 16.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  17. 17.🔍 Which is the odd one out? (a) a temperature sensor (b) a keypad (c) a buzzer (d) a light sensor
  18. 18.🔍 Which is the odd one out? (a) a water pump (b) a temperature sensor (c) a speaker (d) an LED
  19. 19.Which of these is an input? (a) a motion sensor (b) a small display (c) a speaker (d) a servo motor
  20. 20.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  21. 21.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  22. 22.📶 A pin that reads a push button is set as … (a) an input (b) a battery (c) an output (d) a resistor
  23. 23.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    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
  24. 24.📶 Digital or analog: many values in a range? (a) analog (b) digital
  25. 25.💡 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
  26. 26.Which of these is an input? (a) a buzzer (b) a motor (c) a light sensor (d) a servo motor
  27. 27.Which of these is an output? (a) a turning knob (b) a motion sensor (c) a push button (d) a water pump
  28. 28.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  29. 29.Which of these is an input? (a) a speaker (b) a servo motor (c) an LED (d) a turning knob
  30. 30.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  31. 31.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  32. 32.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  33. 33.💡 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) OFF (b) ON
  34. 34.Which of these is an output? (a) a motion sensor (b) a turning knob (c) a keypad (d) a motor
  35. 35.💡 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
  36. 36.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  37. 37.📶 A pin set LOW gives about … (a) 1.5 V (b) 9 V (c) 5 V (d) 0 V
  38. 38.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  39. 39.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  40. 40.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF

Answer key

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

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