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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 413 · 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.

NameDateTime takenScore ___ / 40
  1. 1.💡 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 7 HIGH
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.🔍 Which is the odd one out? (a) an LED (b) a push button (c) a motor (d) a speaker
  3. 3.🔍 Which is the odd one out? (a) a speaker (b) a temperature sensor (c) a water pump (d) an LED
  4. 4.Which of these is an input? (a) a keypad (b) a buzzer (c) a motor (d) a water pump
  5. 5.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  6. 6.🔍 Which is the odd one out? (a) a speaker (b) a motor (c) a small display (d) a light sensor
  7. 7.📶 Digital or analog: many values in a range? (a) digital (b) analog
  8. 8.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  9. 9.Which of these is an output? (a) a keypad (b) a motion sensor (c) a speaker (d) a light sensor
  10. 10.True or false: “the room temperature” is an analog signal. (a) False (b) True
  11. 11.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  12. 12.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  13. 13.🔍 Which is the odd one out? (a) a keypad (b) an LED (c) a turning knob (d) a light sensor
  14. 14.📶 A pin set LOW gives about … (a) 9 V (b) 5 V (c) 0 V (d) 1.5 V
  15. 15.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  16. 16.Which of these is an input? (a) a temperature sensor (b) a servo motor (c) a buzzer (d) a motor
  17. 17.Which of these is an output? (a) a motion sensor (b) a light sensor (c) a water pump (d) a push button
  18. 18.💡 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
  19. 19.Which of these is an input? (a) a speaker (b) a turning knob (c) a motor (d) a buzzer
  20. 20.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  21. 21.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  22. 22.💡 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 7 LOW
    set pin 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  23. 23.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  24. 24.Which of these is an input? (a) a motor (b) a speaker (c) an LED (d) a motion sensor
  25. 25.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  26. 26.🔌 Is a motor an input or an output for a microcontroller? (a) output (b) input
  27. 27.📶 How many states can a digital pin have? (a) a thousand (b) two (c) ten (d) one
  28. 28.💡 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) ON (b) OFF
  29. 29.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  30. 30.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  31. 31.🔍 Which is the odd one out? (a) a temperature sensor (b) a turning knob (c) a sound sensor (d) a water pump
  32. 32.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  33. 33.🔍 Which is the odd one out? (a) a keypad (b) a push button (c) a speaker (d) a motion sensor
  34. 34.Which of these is an input? (a) a small display (b) an LED (c) a water pump (d) a light sensor
  35. 35.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.🔍 Which is the odd one out? (a) a small display (b) a keypad (c) a speaker (d) a water pump
  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 HIGH
    set pin 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  38. 38.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  39. 39.🔍 Which is the odd one out? (a) a keypad (b) a servo motor (c) a temperature sensor (d) a turning knob
  40. 40.Which of these is an output? (a) a light sensor (b) a push button (c) a motor (d) a keypad

Answer key

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

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