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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 834 · 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.🔍 Which is the odd one out? (a) a water pump (b) an LED (c) a sound sensor (d) a servo motor
  2. 2.True or false: “a button: pressed or not” is a digital signal. (a) True (b) False
  3. 3.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 230 V (c) 0 V (d) 5 V
  4. 4.💡 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
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  5. 5.🔍 Which is the odd one out? (a) a turning knob (b) a motion sensor (c) a sound sensor (d) a speaker
  6. 6.Which of these is an output? (a) a servo motor (b) a temperature sensor (c) a keypad (d) a turning knob
  7. 7.Which of these is an input? (a) an LED (b) a water pump (c) a turning knob (d) a small display
  8. 8.True or false: “a door: open or shut” is a digital signal. (a) True (b) False
  9. 9.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  10. 10.📶 Digital or analog: many values in a range? (a) analog (b) digital
  11. 11.Which of these is an output? (a) a turning knob (b) a small display (c) a temperature sensor (d) a sound sensor
  12. 12.True or false: “a knob turned part way” is an analog signal. (a) True (b) False
  13. 13.True or false: “many values in a range” is an analog signal. (a) True (b) False
  14. 14.True or false: “how loud a sound is” is a digital signal. (a) True (b) False
  15. 15.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  16. 16.💡 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) ON (b) OFF
  17. 17.Which of these is an output? (a) a push button (b) a temperature sensor (c) a light sensor (d) an LED
  18. 18.Which of these is an output? (a) a turning knob (b) a push button (c) a buzzer (d) a temperature sensor
  19. 19.Which of these is an input? (a) a motor (b) a buzzer (c) a keypad (d) a small display
  20. 20.🔍 Which is the odd one out? (a) a turning knob (b) a motor (c) a sound sensor (d) a push button
  21. 21.Which of these is an input? (a) a small display (b) a motor (c) a speaker (d) a temperature sensor
  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 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 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  24. 24.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  25. 25.🔍 Which is the odd one out? (a) a servo motor (b) a turning knob (c) a light sensor (d) a push button
  26. 26.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  27. 27.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  28. 28.Which of these is an output? (a) a light sensor (b) a motion sensor (c) a water pump (d) a push button
  29. 29.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) a motion sensor (b) an LED (c) a sound sensor (d) a light sensor
  31. 31.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.📶 A pin that reads a push button is set as … (a) a battery (b) an input (c) a resistor (d) an output
  33. 33.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  34. 34.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  35. 35.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  36. 36.💡 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 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  37. 37.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  38. 38.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  39. 39.🔍 Which is the odd one out? (a) a turning knob (b) a water pump (c) a sound sensor (d) a light sensor
  40. 40.Which of these is an output? (a) a temperature sensor (b) a push button (c) a motor (d) a keypad

Answer key

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

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