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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 200 · 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.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  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 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  4. 4.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  5. 5.Which of these is an input? (a) a small display (b) an LED (c) a buzzer (d) a keypad
  6. 6.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  7. 7.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  8. 8.True or false: “many values in a range” is a digital signal. (a) False (b) True
  9. 9.💡 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) ON (b) OFF
  10. 10.Which of these is an input? (a) a small display (b) a sound sensor (c) a servo motor (d) an LED
  11. 11.💡 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 LOW
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  12. 12.Which of these is an input? (a) a servo motor (b) a small display (c) a buzzer (d) a light sensor
  13. 13.Which of these is an output? (a) a temperature sensor (b) a motion sensor (c) a light sensor (d) a speaker
  14. 14.💡 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
  15. 15.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  16. 16.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  17. 17.📶 A pin set LOW gives about … (a) 1.5 V (b) 9 V (c) 0 V (d) 5 V
  18. 18.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  19. 19.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  20. 20.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  21. 21.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  22. 22.🔍 Which is the odd one out? (a) a turning knob (b) a light sensor (c) an LED (d) a push button
  23. 23.🔍 Which is the odd one out? (a) a push button (b) a small display (c) an LED (d) a buzzer
  24. 24.💡 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) ON (b) OFF
  25. 25.🔍 Which is the odd one out? (a) a small display (b) a sound sensor (c) a turning knob (d) a temperature sensor
  26. 26.Which of these is an input? (a) a speaker (b) an LED (c) a temperature sensor (d) a small display
  27. 27.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 230 V (c) 50 V (d) 0 V
  28. 28.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  29. 29.True or false: “a knob turned part way” is an analog signal. (a) True (b) False
  30. 30.Which of these is an output? (a) a small display (b) a light sensor (c) a push button (d) a keypad
  31. 31.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  32. 32.🔍 Which is the odd one out? (a) a water pump (b) a keypad (c) a speaker (d) a small display
  33. 33.Which of these is an input? (a) a small display (b) an LED (c) a turning knob (d) a water pump
  34. 34.💡 An LED (with its resistor) is on pin 8. 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) ON (b) OFF
  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 8 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.💡 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
  37. 37.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  39. 39.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  40. 40.Which of these is an output? (a) a push button (b) a temperature sensor (c) a buzzer (d) a keypad

Answer key

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

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