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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 266 · 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.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  2. 2.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  3. 3.🔍 Which is the odd one out? (a) a motor (b) a sound sensor (c) a push button (d) a light sensor
  4. 4.🔍 Which is the odd one out? (a) a water pump (b) a keypad (c) a light sensor (d) a push button
  5. 5.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  6. 6.📶 A pin that reads a push button is set as … (a) a resistor (b) a battery (c) an output (d) an input
  7. 7.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  8. 8.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  10. 10.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  11. 11.True or false: “many values in a range” is an analog signal. (a) True (b) False
  12. 12.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.True or false: “HIGH or LOW only” is an analog signal. (a) False (b) True
  15. 15.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 0 V (c) 50 V (d) 230 V
  16. 16.📶 A pin set LOW gives about … (a) 1.5 V (b) 9 V (c) 5 V (d) 0 V
  17. 17.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  18. 18.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  19. 19.💡 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 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  20. 20.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  21. 21.True or false: “a knob turned part way” is an analog signal. (a) True (b) False
  22. 22.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  23. 23.True or false: “a door: open or shut” is a digital signal. (a) True (b) False
  24. 24.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  25. 25.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  26. 26.True or false: “how bright a room is” is an analog signal. (a) False (b) True
  27. 27.Which of these is an output? (a) a push button (b) a turning knob (c) a speaker (d) a temperature sensor
  28. 28.💡 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
  29. 29.🔌 Is a speaker an input or an output for a microcontroller? (a) input (b) output
  30. 30.💡 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 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  31. 31.🔍 Which is the odd one out? (a) an LED (b) a water pump (c) a sound sensor (d) a motor
  32. 32.📶 Digital or analog: how loud a sound is? (a) analog (b) digital
  33. 33.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  34. 34.📶 Digital or analog: how bright a room is? (a) analog (b) digital
  35. 35.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 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 motion sensor (b) a temperature sensor (c) a light sensor (d) an LED
  38. 38.💡 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
  39. 39.Which of these is an input? (a) a small display (b) a temperature sensor (c) a buzzer (d) a speaker
  40. 40.Which of these is an input? (a) a speaker (b) a buzzer (c) a keypad (d) a small display

Answer key

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

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