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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 702 · 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.🔌 Is a speaker an input or an output for a microcontroller? (a) input (b) output
  2. 2.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  3. 3.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  4. 4.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  5. 5.Which of these is an input? (a) a keypad (b) a servo motor (c) a water pump (d) a small display
  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 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  7. 7.Which of these is an output? (a) a motor (b) a temperature sensor (c) a motion sensor (d) a keypad
  8. 8.💡 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) ON (b) OFF
  9. 9.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  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 8 HIGH
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  11. 11.True or false: “many values in a range” is an analog signal. (a) True (b) False
  12. 12.Which of these is an output? (a) a push button (b) a light sensor (c) a motion sensor (d) a water pump
  13. 13.📶 A pin set LOW gives about … (a) 9 V (b) 5 V (c) 0 V (d) 1.5 V
  14. 14.🔍 Which is the odd one out? (a) a keypad (b) a buzzer (c) a motion sensor (d) a push button
  15. 15.📶 A pin that reads a push button is set as … (a) an output (b) a battery (c) a resistor (d) an input
  16. 16.🔍 Which is the odd one out? (a) a speaker (b) a motor (c) a sound sensor (d) a small display
  17. 17.Which of these is an output? (a) a turning knob (b) a push button (c) a temperature sensor (d) a buzzer
  18. 18.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  19. 19.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  20. 20.Which of these is an output? (a) a servo motor (b) a turning knob (c) a push button (d) a light sensor
  21. 21.📶 Digital or analog: the room temperature? (a) digital (b) analog
  22. 22.Which of these is an input? (a) a water pump (b) an LED (c) a motion sensor (d) a small display
  23. 23.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  24. 24.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  25. 25.📶 How many states can a digital pin have? (a) two (b) ten (c) one (d) a thousand
  26. 26.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  27. 27.Which of these is an input? (a) a speaker (b) a push button (c) a buzzer (d) an LED
  28. 28.Which of these is an input? (a) a sound sensor (b) an LED (c) a small display (d) a servo motor
  29. 29.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 LOW
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  30. 30.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  31. 31.💡 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 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  33. 33.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  34. 34.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.💡 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) OFF (b) ON
  36. 36.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  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 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.True or false: “many values in a range” is a digital signal. (a) False (b) True
  39. 39.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  40. 40.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output

Answer key

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

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