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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 303 · 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 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  2. 2.💡 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
  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 LOW
    set pin 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  4. 4.Which of these is an output? (a) a push button (b) a turning knob (c) a keypad (d) a small display
  5. 5.True or false: “a door: open or shut” is a digital signal. (a) True (b) False
  6. 6.🔍 Which is the odd one out? (a) a keypad (b) a temperature sensor (c) a buzzer (d) a light sensor
  7. 7.💡 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 HIGH
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  8. 8.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  9. 9.Which of these is an output? (a) a push button (b) a turning knob (c) a temperature sensor (d) a buzzer
  10. 10.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  11. 11.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 50 V (c) 5 V (d) 0 V
  12. 12.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  13. 13.Which of these is an input? (a) a temperature sensor (b) a buzzer (c) an LED (d) a servo motor
  14. 14.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  15. 15.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  16. 16.🔌 Is a sound sensor an input or an output for a microcontroller? (a) input (b) output
  17. 17.🔍 Which is the odd one out? (a) a sound sensor (b) a speaker (c) an LED (d) a servo motor
  18. 18.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  19. 19.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 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
  20. 20.📶 A pin set LOW gives about … (a) 5 V (b) 9 V (c) 1.5 V (d) 0 V
  21. 21.True or false: “a knob turned part way” is a digital signal. (a) False (b) True
  22. 22.📶 Digital or analog: the room temperature? (a) analog (b) digital
  23. 23.🔍 Which is the odd one out? (a) a push button (b) a keypad (c) a sound sensor (d) a motor
  24. 24.Which of these is an input? (a) a buzzer (b) a keypad (c) an LED (d) a motor
  25. 25.Which of these is an input? (a) a water pump (b) a push button (c) a buzzer (d) a motor
  26. 26.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  27. 27.📶 Digital or analog: many values in a range? (a) analog (b) digital
  28. 28.💡 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 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  29. 29.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  30. 30.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  31. 31.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.🔍 Which is the odd one out? (a) a push button (b) a motor (c) a water pump (d) a speaker
  33. 33.📶 How many states can a digital pin have? (a) a thousand (b) ten (c) two (d) one
  34. 34.🔍 Which is the odd one out? (a) a motion sensor (b) a turning knob (c) a push button (d) a speaker
  35. 35.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  36. 36.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  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 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  38. 38.Which of these is an input? (a) a small display (b) a buzzer (c) a speaker (d) a motion sensor
  39. 39.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  40. 40.🔍 Which is the odd one out? (a) a water pump (b) a buzzer (c) a turning knob (d) a small display

Answer key

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

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