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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 954 · 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 tilt switch: on or off? (a) digital (b) analog
  2. 2.Which of these is an input? (a) a temperature sensor (b) an LED (c) a motor (d) a buzzer
  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 8 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  4. 4.Which of these is an output? (a) a sound sensor (b) a motion sensor (c) an LED (d) a temperature sensor
  5. 5.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  6. 6.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  7. 7.📶 Digital or analog: the room temperature? (a) analog (b) digital
  8. 8.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  9. 9.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) a speaker (b) a temperature sensor (c) a sound sensor (d) a turning knob
  11. 11.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  12. 12.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  13. 13.True or false: “the room temperature” is an analog signal. (a) False (b) True
  14. 14.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  15. 15.Which of these is an input? (a) a keypad (b) a motor (c) a water pump (d) an LED
  16. 16.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  17. 17.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  18. 18.🔍 Which is the odd one out? (a) a servo motor (b) a keypad (c) a motor (d) an LED
  19. 19.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  20. 20.📶 A pin set LOW gives about … (a) 5 V (b) 1.5 V (c) 9 V (d) 0 V
  21. 21.📶 A pin that reads a push button is set as … (a) an output (b) a resistor (c) a battery (d) an input
  22. 22.💡 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 7 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  24. 24.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  25. 25.Which of these is an output? (a) a motion sensor (b) a keypad (c) a small display (d) a temperature sensor
  26. 26.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  27. 27.🔍 Which is the odd one out? (a) a temperature sensor (b) a servo motor (c) a water pump (d) a speaker
  28. 28.Which of these is an input? (a) a sound sensor (b) a servo motor (c) an LED (d) a buzzer
  29. 29.True or false: “many values in a range” is a digital signal. (a) True (b) False
  30. 30.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  31. 31.🔌 Is a turning knob an input or an output for a microcontroller? (a) input (b) output
  32. 32.🔍 Which is the odd one out? (a) a small display (b) a buzzer (c) a motion sensor (d) a servo motor
  33. 33.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 50 V (c) 0 V (d) 5 V
  34. 34.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  36. 36.💡 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 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  37. 37.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  38. 38.💡 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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  39. 39.Which of these is an output? (a) a turning knob (b) a speaker (c) a push button (d) a sound sensor
  40. 40.True or false: “a knob turned part way” is a digital signal. (a) True (b) False

Answer key

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

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