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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 922 · 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.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  3. 3.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  4. 4.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  5. 5.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  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 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  7. 7.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  8. 8.Which of these is an input? (a) a motor (b) an LED (c) a servo motor (d) a push button
  9. 9.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 230 V (c) 50 V (d) 0 V
  10. 10.📶 Digital or analog: many values in a range? (a) analog (b) digital
  11. 11.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  12. 12.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  13. 13.🔍 Which is the odd one out? (a) a speaker (b) a push button (c) a turning knob (d) a motion sensor
  14. 14.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  15. 15.💡 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
  16. 16.Which of these is an output? (a) a light sensor (b) an LED (c) a push button (d) a temperature sensor
  17. 17.📶 How many states can a digital pin have? (a) ten (b) two (c) one (d) a thousand
  18. 18.🔍 Which is the odd one out? (a) a keypad (b) a sound sensor (c) a water pump (d) a motion sensor
  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 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  20. 20.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  21. 21.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  22. 22.True or false: “many values in a range” is an analog signal. (a) False (b) True
  23. 23.Which of these is an input? (a) a speaker (b) an LED (c) a water pump (d) a motion sensor
  24. 24.📶 A pin that reads a push button is set as … (a) a battery (b) an output (c) a resistor (d) an input
  25. 25.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  26. 26.🔍 Which is the odd one out? (a) a light sensor (b) a push button (c) a sound sensor (d) a motor
  27. 27.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  28. 28.Which of these is an output? (a) a keypad (b) a light sensor (c) a motion sensor (d) a small display
  29. 29.Which of these is an output? (a) a push button (b) a light sensor (c) a keypad (d) a water pump
  30. 30.🔌 Is a speaker an input or an output for a microcontroller? (a) input (b) output
  31. 31.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.True or false: “how loud a sound is” is a digital signal. (a) True (b) False
  33. 33.🔍 Which is the odd one out? (a) a push button (b) an LED (c) a keypad (d) a turning knob
  34. 34.Which of these is an output? (a) a sound sensor (b) a light sensor (c) a speaker (d) a push button
  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 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 8. 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) OFF (b) ON
  37. 37.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  38. 38.🔍 Which is the odd one out? (a) a turning knob (b) a push button (c) a buzzer (d) a light sensor
  39. 39.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  40. 40.💡 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) OFF (b) ON

Answer key

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

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