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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 975 · 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.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  2. 2.Which of these is an input? (a) a motor (b) a small display (c) a motion sensor (d) an LED
  3. 3.Which of these is an output? (a) a temperature sensor (b) a turning knob (c) a buzzer (d) a light sensor
  4. 4.📶 A pin that reads a push button is set as … (a) an output (b) a battery (c) a resistor (d) an input
  5. 5.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  6. 6.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  7. 7.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  8. 8.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  9. 9.🔍 Which is the odd one out? (a) a servo motor (b) a light sensor (c) a temperature sensor (d) a push button
  10. 10.Which of these is an input? (a) a water pump (b) a servo motor (c) a turning knob (d) a speaker
  11. 11.💡 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
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  12. 12.Which of these is an output? (a) a light sensor (b) a motion sensor (c) a servo motor (d) a turning knob
  13. 13.💡 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 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  15. 15.Which of these is an output? (a) a sound sensor (b) a motion sensor (c) a motor (d) a light sensor
  16. 16.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  17. 17.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 230 V (c) 5 V (d) 50 V
  18. 18.🔍 Which is the odd one out? (a) a speaker (b) an LED (c) a buzzer (d) a light 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 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  20. 20.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  21. 21.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  22. 22.🔍 Which is the odd one out? (a) a push button (b) a sound sensor (c) a temperature sensor (d) an LED
  23. 23.💡 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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  24. 24.Which of these is an output? (a) a temperature sensor (b) a push button (c) a turning knob (d) a small display
  25. 25.💡 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 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  26. 26.True or false: “a button: pressed or not” is a digital signal. (a) True (b) False
  27. 27.🔍 Which is the odd one out? (a) a keypad (b) a buzzer (c) a servo motor (d) a water pump
  28. 28.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  29. 29.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  30. 30.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  31. 31.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  32. 32.True or false: “the room temperature” is an analog signal. (a) False (b) True
  33. 33.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  34. 34.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  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 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.📶 How many states can a digital pin have? (a) a thousand (b) ten (c) two (d) one
  37. 37.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  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 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.💡 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 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON

Answer key

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

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