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Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 434 · 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: many values in a range? (a) analog (b) digital
  2. 2.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  3. 3.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  4. 4.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  5. 5.🔍 Which is the odd one out? (a) a small display (b) an LED (c) a speaker (d) a keypad
  6. 6.True or false: “a knob turned part way” is a digital signal. (a) True (b) False
  7. 7.📶 On a 5 V board, a pin set HIGH gives about … (a) 5 V (b) 0 V (c) 50 V (d) 230 V
  8. 8.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  9. 9.💡 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 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  10. 10.💡 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) OFF (b) ON
  11. 11.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  12. 12.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  13. 13.📶 A pin that reads a push button is set as … (a) an output (b) a battery (c) an input (d) a resistor
  14. 14.🔍 Which is the odd one out? (a) a turning knob (b) a speaker (c) a light sensor (d) a motion sensor
  15. 15.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  16. 16.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  17. 17.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  18. 18.🔍 Which is the odd one out? (a) a small display (b) a push button (c) a turning knob (d) a light sensor
  19. 19.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  20. 20.💡 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 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  21. 21.🔍 Which is the odd one out? (a) a turning knob (b) a buzzer (c) a small display (d) a servo motor
  22. 22.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  23. 23.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 LOW
    set pin 7 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  24. 24.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  25. 25.Which of these is an output? (a) a turning knob (b) a motor (c) a motion sensor (d) a sound sensor
  26. 26.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  27. 27.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  28. 28.🔍 Which is the odd one out? (a) an LED (b) a small display (c) a motor (d) a motion sensor
  29. 29.True or false: “HIGH or LOW only” is an analog signal. (a) False (b) True
  30. 30.💡 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 HIGH
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  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 LOW
    set pin 8 HIGH
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  33. 33.💡 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
    set pin 7 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 output? (a) a turning knob (b) a push button (c) a small display (d) a sound sensor
  35. 35.🔍 Which is the odd one out? (a) a temperature sensor (b) an LED (c) a servo motor (d) a small display
  36. 36.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  37. 37.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  38. 38.💡 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 7 LOW
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  39. 39.True or false: “the room temperature” is an analog signal. (a) False (b) True
  40. 40.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON

Answer key

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

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