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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 596 · 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: how loud a sound is? (a) digital (b) analog
  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 8 LOW
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  3. 3.📶 A pin set LOW gives about … (a) 0 V (b) 5 V (c) 9 V (d) 1.5 V
  4. 4.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  5. 5.True or false: “how loud a sound is” is an analog signal. (a) False (b) True
  6. 6.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  7. 7.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  8. 8.🔍 Which is the odd one out? (a) a motor (b) a small display (c) a light sensor (d) a water pump
  9. 9.Which of these is an output? (a) a light sensor (b) a speaker (c) a motion sensor (d) a temperature sensor
  10. 10.True or false: “how bright a room is” is an analog signal. (a) True (b) False
  11. 11.📶 Digital or analog: the room temperature? (a) analog (b) digital
  12. 12.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  13. 13.💡 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
  14. 14.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  15. 15.Which of these is an input? (a) a small display (b) a speaker (c) a light sensor (d) an LED
  16. 16.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  17. 17.💡 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 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  18. 18.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  19. 19.True or false: “HIGH or LOW only” is an analog signal. (a) True (b) False
  20. 20.Which of these is an output? (a) a keypad (b) a water pump (c) a push button (d) a turning knob
  21. 21.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  22. 22.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 50 V (c) 5 V (d) 230 V
  23. 23.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.🔍 Which is the odd one out? (a) a push button (b) a light sensor (c) a motion sensor (d) a motor
  25. 25.📶 A pin that reads a push button is set as … (a) an output (b) a resistor (c) an input (d) a battery
  26. 26.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  27. 27.📶 Digital or analog: many values in a range? (a) analog (b) digital
  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 HIGH
    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
  29. 29.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  30. 30.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  31. 31.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.💡 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) ON (b) OFF
  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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.Which of these is an output? (a) a light sensor (b) an LED (c) a temperature sensor (d) a sound sensor
  35. 35.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  36. 36.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    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
  37. 37.🔍 Which is the odd one out? (a) a temperature sensor (b) an LED (c) a small display (d) a motor
  38. 38.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  39. 39.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  40. 40.💡 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 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON

Answer key

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

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