← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 772 · 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.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  2. 2.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  3. 3.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  4. 4.💡 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 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  5. 5.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  6. 6.📶 A pin that reads a push button is set as … (a) an output (b) a resistor (c) an input (d) a battery
  7. 7.🔍 Which is the odd one out? (a) a motion sensor (b) a turning knob (c) a sound sensor (d) a motor
  8. 8.📶 Digital or analog: many values in a range? (a) digital (b) analog
  9. 9.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  10. 10.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  11. 11.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  12. 12.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  13. 13.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  14. 14.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  15. 15.💡 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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  16. 16.💡 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
  17. 17.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  18. 18.Which of these is an input? (a) a servo motor (b) an LED (c) a speaker (d) a sound sensor
  19. 19.💡 An LED (with its resistor) is on pin 8. 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) OFF (b) ON
  20. 20.🔍 Which is the odd one out? (a) a speaker (b) a motion sensor (c) a sound sensor (d) a push button
  21. 21.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 0 V (c) 230 V (d) 5 V
  22. 22.Which of these is an input? (a) a servo motor (b) a motion sensor (c) a small display (d) a water pump
  23. 23.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    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
  24. 24.Which of these is an input? (a) a push button (b) a water pump (c) a speaker (d) a buzzer
  25. 25.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  26. 26.💡 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
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  27. 27.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  28. 28.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  29. 29.🔍 Which is the odd one out? (a) a push button (b) a motor (c) a buzzer (d) a small display
  30. 30.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  31. 31.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  32. 32.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  33. 33.Which of these is an output? (a) a temperature sensor (b) a push button (c) a motor (d) a turning knob
  34. 34.🔍 Which is the odd one out? (a) a speaker (b) a motor (c) a motion sensor (d) a water pump
  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.🔍 Which is the odd one out? (a) an LED (b) a small display (c) a sound sensor (d) a motor
  37. 37.🔌 Is a speaker an input or an output for a microcontroller? (a) input (b) output
  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 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  40. 40.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF

Answer key

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

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