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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 939 · 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: a door: open or shut? (a) digital (b) analog
  2. 2.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  3. 3.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  4. 4.💡 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
  5. 5.💡 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 7 HIGH
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  6. 6.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  7. 7.Which of these is an output? (a) a push button (b) a temperature sensor (c) a light sensor (d) a servo motor
  8. 8.Which of these is an input? (a) a speaker (b) a servo motor (c) a motor (d) a turning knob
  9. 9.📶 A pin that reads a push button is set as … (a) an input (b) a battery (c) an output (d) a resistor
  10. 10.Which of these is an input? (a) a servo motor (b) a motor (c) a motion sensor (d) a buzzer
  11. 11.💡 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
    set pin 8 LOW
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  12. 12.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  13. 13.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  14. 14.🔍 Which is the odd one out? (a) an LED (b) a servo motor (c) a temperature sensor (d) a motor
  15. 15.💡 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) OFF (b) ON
  16. 16.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 230 V (c) 5 V (d) 50 V
  17. 17.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  18. 18.Which of these is an input? (a) a buzzer (b) a temperature sensor (c) a water pump (d) a motor
  19. 19.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) a temperature sensor (b) a light sensor (c) a motion sensor (d) an LED
  21. 21.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  22. 22.💡 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 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  25. 25.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  26. 26.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  27. 27.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  28. 28.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  29. 29.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  30. 30.💡 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
  31. 31.🔍 Which is the odd one out? (a) a turning knob (b) a push button (c) a light sensor (d) a small display
  32. 32.True or false: “the room temperature” is an analog signal. (a) True (b) False
  33. 33.🔍 Which is the odd one out? (a) a small display (b) a motor (c) a water pump (d) a push button
  34. 34.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  35. 35.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  36. 36.Which of these is an input? (a) a small display (b) a motor (c) a push button (d) a speaker
  37. 37.💡 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
    set pin 7 HIGH
    set pin 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.📶 A pin set LOW gives about … (a) 0 V (b) 5 V (c) 1.5 V (d) 9 V
  39. 39.🔍 Which is the odd one out? (a) an LED (b) a motor (c) a motion sensor (d) a water pump
  40. 40.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF

Answer key

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

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