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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 356 · 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 temperature sensor an input or an output for a microcontroller? (a) output (b) input
  2. 2.💡 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) OFF (b) ON
  3. 3.Which of these is an output? (a) a turning knob (b) a sound sensor (c) an LED (d) a motion sensor
  4. 4.Which of these is an output? (a) a sound sensor (b) a temperature sensor (c) a motion sensor (d) a motor
  5. 5.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  6. 6.Which of these is an input? (a) a buzzer (b) a water pump (c) an LED (d) a temperature sensor
  7. 7.🔍 Which is the odd one out? (a) a motion sensor (b) a water pump (c) a turning knob (d) a sound sensor
  8. 8.True or false: “many values in a range” is an analog signal. (a) True (b) False
  9. 9.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  10. 10.Which of these is an input? (a) a small display (b) a water pump (c) a buzzer (d) a keypad
  11. 11.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  12. 12.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  13. 13.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  15. 15.📶 A pin that reads a push button is set as … (a) an output (b) a resistor (c) a battery (d) an input
  16. 16.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  17. 17.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  18. 18.Which of these is an input? (a) an LED (b) a motor (c) a sound sensor (d) a speaker
  19. 19.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  20. 20.Which of these is an output? (a) a speaker (b) a sound sensor (c) a temperature sensor (d) a turning knob
  21. 21.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  22. 22.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  23. 23.🔍 Which is the odd one out? (a) a light sensor (b) a sound sensor (c) an LED (d) a turning knob
  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) OFF (b) ON
  25. 25.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  26. 26.🔍 Which is the odd one out? (a) a buzzer (b) a temperature sensor (c) an LED (d) a small display
  27. 27.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  28. 28.🔍 Which is the odd one out? (a) a motion sensor (b) a push button (c) a temperature sensor (d) a small display
  29. 29.💡 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
  30. 30.🔍 Which is the odd one out? (a) a servo motor (b) an LED (c) a sound sensor (d) a small display
  31. 31.💡 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) OFF (b) ON
  32. 32.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  33. 33.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  34. 34.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  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 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.🔍 Which is the odd one out? (a) a keypad (b) a turning knob (c) a servo motor (d) a light sensor
  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 7 LOW
    set pin 7 LOW
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  39. 39.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  40. 40.💡 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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF

Answer key

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

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