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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 326 · 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.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 50 V (c) 230 V (d) 0 V
  2. 2.True or false: “the room temperature” is a digital signal. (a) False (b) True
  3. 3.Which of these is an input? (a) a small display (b) a push button (c) a motor (d) a servo motor
  4. 4.🔍 Which is the odd one out? (a) a servo motor (b) a keypad (c) an LED (d) a water pump
  5. 5.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  6. 6.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  7. 7.📶 A pin that reads a push button is set as … (a) a resistor (b) an output (c) an input (d) a battery
  8. 8.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  9. 9.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  10. 10.Which of these is an input? (a) a water pump (b) a light sensor (c) an LED (d) a servo motor
  11. 11.💡 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 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  12. 12.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  13. 13.📶 Digital or analog: many values in a range? (a) analog (b) digital
  14. 14.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.Which of these is an output? (a) a push button (b) a small display (c) a turning knob (d) a light sensor
  16. 16.Which of these is an input? (a) a water pump (b) a speaker (c) a temperature sensor (d) a servo motor
  17. 17.True or false: “many values in a range” is a digital signal. (a) True (b) False
  18. 18.Which of these is an input? (a) a small display (b) an LED (c) a keypad (d) a water pump
  19. 19.📶 A pin set LOW gives about … (a) 1.5 V (b) 5 V (c) 9 V (d) 0 V
  20. 20.🔍 Which is the odd one out? (a) a motion sensor (b) a water pump (c) a turning knob (d) a sound sensor
  21. 21.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  22. 22.💡 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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.🔍 Which is the odd one out? (a) a push button (b) a turning knob (c) a motion sensor (d) an LED
  24. 24.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  25. 25.Which of these is an output? (a) a light sensor (b) a turning knob (c) a speaker (d) a push button
  26. 26.Which of these is an output? (a) a push button (b) a turning knob (c) a keypad (d) an LED
  27. 27.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  28. 28.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  29. 29.🔍 Which is the odd one out? (a) a motion sensor (b) a push button (c) a buzzer (d) a light sensor
  30. 30.Which of these is an input? (a) a sound sensor (b) a servo motor (c) a motor (d) a buzzer
  31. 31.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  32. 32.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  33. 33.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    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
  34. 34.Which of these is an input? (a) a motion sensor (b) a water pump (c) a motor (d) a servo motor
  35. 35.True or false: “a door: open or shut” is a digital signal. (a) True (b) False
  36. 36.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  37. 37.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.💡 An LED (with its resistor) is on pin 8. 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.🔍 Which is the odd one out? (a) an LED (b) a buzzer (c) a small display (d) a light sensor
  40. 40.🔍 Which is the odd one out? (a) a small display (b) a temperature sensor (c) a buzzer (d) a motor

Answer key

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

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