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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 634 · 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.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 0 V (c) 5 V (d) 50 V
  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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  3. 3.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  4. 4.Which of these is an input? (a) a water pump (b) a motor (c) a light sensor (d) a small display
  5. 5.📶 Digital or analog: the room temperature? (a) analog (b) digital
  6. 6.Which of these is an output? (a) a water pump (b) a sound sensor (c) a turning knob (d) a motion sensor
  7. 7.🔍 Which is the odd one out? (a) a turning knob (b) a keypad (c) a servo motor (d) a motion sensor
  8. 8.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  9. 9.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  10. 10.Which of these is an output? (a) a turning knob (b) a light sensor (c) a motion sensor (d) an LED
  11. 11.🔌 Is a servo motor 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) an output (b) a resistor (c) an input (d) a battery
  13. 13.📶 Digital or analog: how loud a sound is? (a) analog (b) digital
  14. 14.🔍 Which is the odd one out? (a) a motor (b) a push button (c) a temperature sensor (d) a turning knob
  15. 15.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  16. 16.🔍 Which is the odd one out? (a) a push button (b) a motor (c) a small display (d) a water pump
  17. 17.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  18. 18.Which of these is an output? (a) a push button (b) a temperature sensor (c) a speaker (d) a keypad
  19. 19.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  20. 20.Which of these is an input? (a) a motor (b) a buzzer (c) a push button (d) a water pump
  21. 21.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  22. 22.💡 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 HIGH
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  23. 23.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  24. 24.📶 How many states can a digital pin have? (a) one (b) two (c) ten (d) a thousand
  25. 25.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  26. 26.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  27. 27.🔍 Which is the odd one out? (a) an LED (b) a buzzer (c) a motion sensor (d) a motor
  28. 28.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  29. 29.📶 A pin set LOW gives about … (a) 0 V (b) 9 V (c) 1.5 V (d) 5 V
  30. 30.Which of these is an input? (a) a sound sensor (b) an LED (c) a servo motor (d) a speaker
  31. 31.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  32. 32.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  33. 33.True or false: “the room temperature” is an analog signal. (a) True (b) False
  34. 34.🔍 Which is the odd one out? (a) a small display (b) an LED (c) a light sensor (d) a servo motor
  35. 35.💡 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
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  37. 37.🔍 Which is the odd one out? (a) a light sensor (b) a motion sensor (c) a speaker (d) a temperature sensor
  38. 38.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    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) ON (b) OFF
  40. 40.Which of these is an input? (a) a speaker (b) an LED (c) a temperature sensor (d) a motor

Answer key

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

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