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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 578 · 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.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.Which of these is an input? (a) a light sensor (b) a motor (c) a speaker (d) a servo motor
  3. 3.Which of these is an input? (a) a turning knob (b) a small display (c) a water pump (d) an LED
  4. 4.Which of these is an output? (a) a temperature sensor (b) a motor (c) a light sensor (d) a motion sensor
  5. 5.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  6. 6.💡 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 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  7. 7.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  8. 8.Which of these is an input? (a) a small display (b) a push button (c) a water pump (d) a speaker
  9. 9.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  10. 10.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  11. 11.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  12. 12.🔍 Which is the odd one out? (a) an LED (b) a temperature sensor (c) a keypad (d) a turning knob
  13. 13.Which of these is an output? (a) a sound sensor (b) a speaker (c) a temperature sensor (d) a keypad
  14. 14.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.🔍 Which is the odd one out? (a) a sound sensor (b) a servo motor (c) an LED (d) a speaker
  16. 16.💡 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 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  17. 17.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  18. 18.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  19. 19.📶 A pin that reads a push button is set as … (a) a resistor (b) an input (c) a battery (d) an output
  20. 20.📶 A pin set LOW gives about … (a) 9 V (b) 5 V (c) 0 V (d) 1.5 V
  21. 21.🔍 Which is the odd one out? (a) a motion sensor (b) a temperature sensor (c) a light sensor (d) a servo motor
  22. 22.🔍 Which is the odd one out? (a) an LED (b) a speaker (c) a buzzer (d) a push button
  23. 23.📶 Digital or analog: many values in a range? (a) digital (b) analog
  24. 24.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  25. 25.🔍 Which is the odd one out? (a) a water pump (b) an LED (c) a small display (d) a light sensor
  26. 26.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  27. 27.Which of these is an input? (a) a motor (b) a servo motor (c) a small display (d) a sound sensor
  28. 28.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  29. 29.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  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 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  31. 31.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  32. 32.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  33. 33.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  34. 34.💡 An LED (with its resistor) is on pin 7. 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
  35. 35.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  36. 36.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  37. 37.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  38. 38.📶 How many states can a digital pin have? (a) ten (b) a thousand (c) two (d) one
  39. 39.📶 Digital or analog: how loud a sound is? (a) analog (b) digital
  40. 40.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True

Answer key

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

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