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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 1 · 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 loud a sound is? (a) digital (b) analog
  2. 2.Which of these is an output? (a) an LED (b) a motion sensor (c) a turning knob (d) a push button
  3. 3.Which of these is an input? (a) a motor (b) a buzzer (c) a push button (d) a water pump
  4. 4.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  5. 5.True or false: “many values in a range” is a digital signal. (a) False (b) True
  6. 6.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  7. 7.Which of these is an input? (a) a buzzer (b) an LED (c) a water pump (d) a turning knob
  8. 8.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  9. 9.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) a sound sensor (b) a light sensor (c) a small display (d) a motion sensor
  11. 11.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  12. 12.📶 A pin that reads a push button is set as … (a) a resistor (b) an output (c) an input (d) a battery
  13. 13.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  14. 14.Which of these is an output? (a) a light sensor (b) a temperature sensor (c) a buzzer (d) a motion sensor
  15. 15.💡 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
  16. 16.💡 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
  17. 17.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 5 V (c) 50 V (d) 230 V
  18. 18.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  19. 19.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  20. 20.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    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.📶 Digital or analog: the room temperature? (a) digital (b) analog
  22. 22.Which of these is an output? (a) a turning knob (b) a light sensor (c) a keypad (d) a servo motor
  23. 23.Which of these is an output? (a) a sound sensor (b) a turning knob (c) a water pump (d) a keypad
  24. 24.📶 Digital or analog: many values in a range? (a) analog (b) digital
  25. 25.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  26. 26.💡 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 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  27. 27.Which of these is an input? (a) a light sensor (b) a servo motor (c) an LED (d) a motor
  28. 28.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  29. 29.💡 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
    set pin 8 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  30. 30.🔌 Is a buzzer 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 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  33. 33.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  34. 34.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  35. 35.💡 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 7 HIGH
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  37. 37.Which of these is an output? (a) a motion sensor (b) a light sensor (c) a motor (d) a keypad
  38. 38.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  40. 40.Which of these is an output? (a) a light sensor (b) a temperature sensor (c) a small display (d) a keypad

Answer key

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

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