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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 272 · 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 7 LOW
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.💡 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 7 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  3. 3.🔍 Which is the odd one out? (a) a turning knob (b) a sound sensor (c) a temperature sensor (d) a servo motor
  4. 4.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 5 V (c) 50 V (d) 0 V
  5. 5.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  6. 6.Which of these is an output? (a) an LED (b) a keypad (c) a motion sensor (d) a temperature sensor
  7. 7.Which of these is an input? (a) a servo motor (b) a buzzer (c) a water pump (d) a light sensor
  8. 8.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  9. 9.📶 Digital or analog: the room temperature? (a) analog (b) digital
  10. 10.🔍 Which is the odd one out? (a) a temperature sensor (b) a motion sensor (c) a light sensor (d) a small display
  11. 11.True or false: “many values in a range” 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: a door: open or shut? (a) analog (b) digital
  14. 14.🔍 Which is the odd one out? (a) a sound sensor (b) a buzzer (c) a motion sensor (d) a light sensor
  15. 15.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  16. 16.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  17. 17.📶 A pin set LOW gives about … (a) 0 V (b) 5 V (c) 9 V (d) 1.5 V
  18. 18.💡 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 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  19. 19.Which of these is an input? (a) a buzzer (b) a push button (c) a motor (d) a speaker
  20. 20.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  21. 21.📶 Digital or analog: many values in a range? (a) digital (b) analog
  22. 22.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  23. 23.📶 How many states can a digital pin have? (a) one (b) a thousand (c) two (d) ten
  24. 24.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  25. 25.💡 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 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  26. 26.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  27. 27.Which of these is an input? (a) a turning knob (b) a speaker (c) a buzzer (d) a servo motor
  28. 28.🔍 Which is the odd one out? (a) a light sensor (b) a temperature sensor (c) a motion sensor (d) a motor
  29. 29.💡 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 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  30. 30.Which of these is an output? (a) a motor (b) a push button (c) a motion sensor (d) a turning knob
  31. 31.🔍 Which is the odd one out? (a) a push button (b) a keypad (c) an LED (d) a sound sensor
  32. 32.Which of these is an output? (a) a light sensor (b) a temperature sensor (c) a push button (d) a small display
  33. 33.💡 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
  34. 34.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  36. 36.🔍 Which is the odd one out? (a) a speaker (b) a buzzer (c) a water pump (d) a keypad
  37. 37.💡 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 7 HIGH
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  39. 39.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  40. 40.💡 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) OFF (b) ON

Answer key

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

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