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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 147 · 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: a knob turned part way? (a) analog (b) digital
  2. 2.Which of these is an output? (a) a push button (b) a light sensor (c) a temperature sensor (d) an LED
  3. 3.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  4. 4.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  5. 5.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  6. 6.Which of these is an output? (a) a turning knob (b) a push button (c) a buzzer (d) a sound sensor
  7. 7.📶 A pin set LOW gives about … (a) 1.5 V (b) 0 V (c) 5 V (d) 9 V
  8. 8.🔍 Which is the odd one out? (a) an LED (b) a light sensor (c) a buzzer (d) a servo motor
  9. 9.🔍 Which is the odd one out? (a) a motion sensor (b) a sound sensor (c) a buzzer (d) a light sensor
  10. 10.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  11. 11.🔍 Which is the odd one out? (a) a water pump (b) a buzzer (c) a motor (d) a motion sensor
  12. 12.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  13. 13.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.💡 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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  15. 15.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  16. 16.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  17. 17.🔍 Which is the odd one out? (a) a temperature sensor (b) a buzzer (c) a motor (d) a small display
  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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  19. 19.💡 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 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  20. 20.Which of these is an input? (a) a water pump (b) a turning knob (c) a buzzer (d) a servo motor
  21. 21.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.🔍 Which is the odd one out? (a) a push button (b) a sound sensor (c) a temperature sensor (d) a small display
  23. 23.True or false: “many values in a range” is a digital signal. (a) False (b) True
  24. 24.True or false: “how loud a sound is” is an analog signal. (a) False (b) True
  25. 25.💡 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
  26. 26.Which of these is an input? (a) a motor (b) a sound sensor (c) a water pump (d) a servo motor
  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 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  28. 28.📶 A pin that reads a push button is set as … (a) an output (b) an input (c) a battery (d) a resistor
  29. 29.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  30. 30.🔍 Which is the odd one out? (a) a push button (b) a temperature sensor (c) a speaker (d) a light sensor
  31. 31.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  32. 32.🔌 Is a light sensor an input or an output for a microcontroller? (a) input (b) output
  33. 33.Which of these is an output? (a) a keypad (b) a motor (c) a light sensor (d) a temperature sensor
  34. 34.🔍 Which is the odd one out? (a) a turning knob (b) a motion sensor (c) a keypad (d) a servo motor
  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 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.📶 Digital or analog: the room temperature? (a) analog (b) digital
  37. 37.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  38. 38.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  39. 39.🔍 Which is the odd one out? (a) a motor (b) a keypad (c) a motion sensor (d) a light sensor
  40. 40.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON

Answer key

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

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