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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 603 · 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 is the odd one out? (a) a speaker (b) a push button (c) a water pump (d) a motor
  3. 3.Which of these is an input? (a) a servo motor (b) a water pump (c) a push button (d) a buzzer
  4. 4.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  5. 5.Which of these is an input? (a) an LED (b) a servo motor (c) a small display (d) a light sensor
  6. 6.📶 How many states can a digital pin have? (a) ten (b) a thousand (c) two (d) one
  7. 7.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  8. 8.🔍 Which is the odd one out? (a) a motor (b) a speaker (c) a servo motor (d) a light sensor
  9. 9.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  10. 10.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  11. 11.Which of these is an output? (a) a light sensor (b) a small display (c) a turning knob (d) a push button
  12. 12.🔍 Which is the odd one out? (a) a keypad (b) a push button (c) a motion sensor (d) an LED
  13. 13.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  14. 14.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  15. 15.🔍 Which is the odd one out? (a) a temperature sensor (b) a push button (c) a small display (d) a light sensor
  16. 16.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  17. 17.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  18. 18.📶 Digital or analog: many values in a range? (a) analog (b) digital
  19. 19.True or false: “many values in a range” is an analog signal. (a) True (b) False
  20. 20.Which of these is an input? (a) a servo motor (b) a speaker (c) a motor (d) a sound sensor
  21. 21.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    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
  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 8 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  23. 23.💡 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
  24. 24.📶 A pin that reads a push button is set as … (a) a resistor (b) a battery (c) an input (d) an output
  25. 25.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  26. 26.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 50 V (c) 5 V (d) 230 V
  27. 27.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  28. 28.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  29. 29.💡 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 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  30. 30.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  31. 31.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  32. 32.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  33. 33.🔍 Which is the odd one out? (a) a buzzer (b) a light sensor (c) a temperature sensor (d) a push button
  34. 34.🔍 Which is the odd one out? (a) a push button (b) a temperature sensor (c) a motor (d) a turning knob
  35. 35.True or false: “a button: pressed or not” is an analog signal. (a) False (b) True
  36. 36.Which of these is an input? (a) a water pump (b) a small display (c) a buzzer (d) a motion sensor
  37. 37.🔍 Which is the odd one out? (a) a sound sensor (b) a temperature sensor (c) a turning knob (d) a water pump
  38. 38.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  39. 39.📶 A pin set LOW gives about … (a) 0 V (b) 9 V (c) 5 V (d) 1.5 V
  40. 40.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input

Answer key

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

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