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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 980 · 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 8 HIGH
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  2. 2.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  3. 3.💡 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
  4. 4.💡 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 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  5. 5.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  6. 6.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  7. 7.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  8. 8.🔍 Which is the odd one out? (a) a water pump (b) a servo motor (c) a motor (d) a sound sensor
  9. 9.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  10. 10.True or false: “a knob turned part way” is a digital signal. (a) False (b) True
  11. 11.🔍 Which is the odd one out? (a) a push button (b) a servo motor (c) a water pump (d) a motor
  12. 12.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  13. 13.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  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 LOW
    set pin 8 LOW
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  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 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  17. 17.🔍 Which is the odd one out? (a) a motor (b) a buzzer (c) a keypad (d) a water pump
  18. 18.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  19. 19.💡 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
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  20. 20.💡 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 7 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  21. 21.Which of these is an input? (a) a motor (b) a speaker (c) a temperature sensor (d) a small display
  22. 22.📶 Digital or analog: the room temperature? (a) analog (b) digital
  23. 23.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  24. 24.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  25. 25.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 5 V (c) 50 V (d) 230 V
  26. 26.📶 How many states can a digital pin have? (a) a thousand (b) two (c) one (d) ten
  27. 27.Which of these is an input? (a) a water pump (b) a motor (c) a speaker (d) a push button
  28. 28.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  29. 29.True or false: “the room temperature” is an analog signal. (a) True (b) False
  30. 30.💡 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 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  31. 31.📶 Digital or analog: many values in a range? (a) digital (b) analog
  32. 32.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  33. 33.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  34. 34.💡 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
  35. 35.Which of these is an output? (a) a water pump (b) a temperature sensor (c) a light sensor (d) a motion sensor
  36. 36.🔍 Which is the odd one out? (a) a keypad (b) a push button (c) an LED (d) a sound sensor
  37. 37.🔍 Which is the odd one out? (a) a buzzer (b) a servo motor (c) a turning knob (d) a speaker
  38. 38.True or false: “many values in a range” is a digital signal. (a) False (b) True
  39. 39.Which of these is an input? (a) a motor (b) a buzzer (c) a light sensor (d) a small display
  40. 40.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input

Answer key

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

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