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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 809 · 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 sound sensor an input or an output for a microcontroller? (a) input (b) output
  2. 2.Which of these is an output? (a) a motion sensor (b) a temperature sensor (c) a keypad (d) a buzzer
  3. 3.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  4. 4.Which of these is an output? (a) a turning knob (b) a servo motor (c) a temperature sensor (d) a sound sensor
  5. 5.🔍 Which is the odd one out? (a) a sound sensor (b) an LED (c) a small display (d) a water pump
  6. 6.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  7. 7.🔍 Which is the odd one out? (a) a temperature sensor (b) a light sensor (c) a turning knob (d) an LED
  8. 8.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  9. 9.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  10. 10.🔍 Which is the odd one out? (a) a temperature sensor (b) a motor (c) an LED (d) a water pump
  11. 11.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  12. 12.📶 How many states can a digital pin have? (a) one (b) a thousand (c) ten (d) two
  13. 13.🔍 Which is the odd one out? (a) a turning knob (b) a push button (c) a temperature sensor (d) a water pump
  14. 14.📶 A pin set LOW gives about … (a) 0 V (b) 1.5 V (c) 5 V (d) 9 V
  15. 15.Which of these is an input? (a) a buzzer (b) a sound sensor (c) a small display (d) a motor
  16. 16.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  17. 17.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  18. 18.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  19. 19.🔍 Which is the odd one out? (a) a push button (b) a servo motor (c) a light sensor (d) a turning knob
  20. 20.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  21. 21.🔍 Which is the odd one out? (a) a speaker (b) a motion sensor (c) a light sensor (d) a push button
  22. 22.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  23. 23.📶 A pin that reads a push button is set as … (a) a resistor (b) a battery (c) an output (d) an input
  24. 24.Which of these is an input? (a) an LED (b) a motor (c) a light sensor (d) a water pump
  25. 25.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  26. 26.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  27. 27.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  28. 28.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  29. 29.🔍 Which is the odd one out? (a) a push button (b) an LED (c) a buzzer (d) a motor
  30. 30.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  31. 31.Which of these is an output? (a) a light sensor (b) a push button (c) an LED (d) a temperature sensor
  32. 32.🔍 Which is the odd one out? (a) a servo motor (b) a speaker (c) a buzzer (d) a turning knob
  33. 33.💡 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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  34. 34.💡 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) OFF (b) ON
  35. 35.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  36. 36.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  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 7 HIGH
    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
  38. 38.💡 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
  39. 39.True or false: “many values in a range” is an analog signal. (a) False (b) True
  40. 40.💡 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 8 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF

Answer key

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

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