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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 787 · 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: many values in a range? (a) analog (b) digital
  2. 2.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  3. 3.Which of these is an output? (a) a turning knob (b) a temperature sensor (c) a motor (d) a light sensor
  4. 4.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 0 V (c) 50 V (d) 5 V
  5. 5.📶 How many states can a digital pin have? (a) a thousand (b) ten (c) one (d) two
  6. 6.📶 A pin set LOW gives about … (a) 0 V (b) 9 V (c) 1.5 V (d) 5 V
  7. 7.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 LOW
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  8. 8.📶 A pin that reads a push button is set as … (a) an input (b) a battery (c) a resistor (d) an output
  9. 9.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  10. 10.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  11. 11.🔍 Which is the odd one out? (a) an LED (b) a keypad (c) a buzzer (d) a servo motor
  12. 12.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  13. 13.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  14. 14.💡 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) ON (b) OFF
  15. 15.💡 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 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  16. 16.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  17. 17.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  18. 18.Which of these is an input? (a) an LED (b) a push button (c) a water pump (d) a motor
  19. 19.Which of these is an input? (a) a buzzer (b) a motor (c) a water pump (d) a light sensor
  20. 20.Which of these is an input? (a) a water pump (b) an LED (c) a small display (d) a keypad
  21. 21.🔍 Which is the odd one out? (a) a keypad (b) a push button (c) a motion sensor (d) a servo motor
  22. 22.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  23. 23.Which of these is an input? (a) a motor (b) a motion sensor (c) a small display (d) a servo motor
  24. 24.🔍 Which is the odd one out? (a) a buzzer (b) an LED (c) a motor (d) a turning knob
  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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  26. 26.🔍 Which is the odd one out? (a) a light sensor (b) a small display (c) a keypad (d) a turning knob
  27. 27.Which of these is an output? (a) a push button (b) a turning knob (c) a buzzer (d) a keypad
  28. 28.🔍 Which is the odd one out? (a) a keypad (b) a push button (c) a water pump (d) a sound sensor
  29. 29.🔍 Which is the odd one out? (a) a push button (b) a buzzer (c) a temperature sensor (d) a sound sensor
  30. 30.Which of these is an output? (a) a push button (b) a sound sensor (c) a speaker (d) a motion sensor
  31. 31.Which of these is an output? (a) a light sensor (b) a keypad (c) an LED (d) a motion sensor
  32. 32.🔍 Which is the odd one out? (a) a push button (b) a sound sensor (c) a motor (d) a keypad
  33. 33.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input
  34. 34.🔍 Which is the odd one out? (a) a servo motor (b) a speaker (c) a small display (d) a sound sensor
  35. 35.💡 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
    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
  36. 36.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  37. 37.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  38. 38.🔍 Which is the odd one out? (a) a buzzer (b) a water pump (c) a speaker (d) a light sensor
  39. 39.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  40. 40.Which of these is an input? (a) a servo motor (b) a turning knob (c) a small display (d) a speaker

Answer key

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

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