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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 907 · 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.

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  1. 1.True or false: “how bright a room is” is an analog signal. (a) False (b) True
  2. 2.📶 Digital or analog: a door: open or shut? (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 8 HIGH
    set pin 8 HIGH
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  4. 4.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  5. 5.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  6. 6.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  7. 7.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  8. 8.Which of these is an input? (a) an LED (b) a servo motor (c) a motor (d) a turning knob
  9. 9.🔍 Which is the odd one out? (a) a keypad (b) a motor (c) a motion sensor (d) a light sensor
  10. 10.🔍 Which is the odd one out? (a) a servo motor (b) a turning knob (c) an LED (d) a buzzer
  11. 11.🔍 Which is the odd one out? (a) a small display (b) an LED (c) a servo motor (d) a push button
  12. 12.🔍 Which is the odd one out? (a) a temperature sensor (b) a turning knob (c) a servo motor (d) a light sensor
  13. 13.📶 A pin that reads a push button is set as … (a) an input (b) a resistor (c) an output (d) a battery
  14. 14.🔍 Which is the odd one out? (a) an LED (b) a temperature sensor (c) a turning knob (d) a light sensor
  15. 15.Which of these is an input? (a) a motor (b) a servo motor (c) a speaker (d) a push button
  16. 16.💡 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
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  17. 17.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  18. 18.💡 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 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  19. 19.Which of these is an output? (a) a push button (b) a turning knob (c) an LED (d) a sound sensor
  20. 20.Which of these is an output? (a) a keypad (b) a buzzer (c) a sound sensor (d) a temperature sensor
  21. 21.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.True or false: “the room temperature” is a digital signal. (a) False (b) True
  23. 23.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  24. 24.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  25. 25.🔍 Which is the odd one out? (a) a servo motor (b) a motion sensor (c) a motor (d) a water pump
  26. 26.💡 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) OFF (b) ON
  27. 27.True or false: “how loud a sound is” is an analog signal. (a) False (b) True
  28. 28.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  29. 29.🔌 Is a sound sensor an input or an output for a microcontroller? (a) input (b) output
  30. 30.Which of these is an output? (a) a sound sensor (b) a turning knob (c) a light sensor (d) a water pump
  31. 31.💡 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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.💡 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
  33. 33.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  34. 34.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  35. 35.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.💡 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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.🔍 Which is the odd one out? (a) a sound sensor (b) a motion sensor (c) a buzzer (d) a keypad
  39. 39.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  40. 40.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input

Answer key

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

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