← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 768 · 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.📶 Digital or analog: a tilt switch: on or off? (a) digital (b) analog
  2. 2.📶 A pin that reads a push button is set as … (a) a resistor (b) a battery (c) an output (d) an input
  3. 3.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  4. 4.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  5. 5.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  6. 6.📶 How many states can a digital pin have? (a) one (b) two (c) a thousand (d) ten
  7. 7.Which of these is an output? (a) a sound sensor (b) a turning knob (c) a speaker (d) a keypad
  8. 8.🔍 Which is the odd one out? (a) a light sensor (b) a turning knob (c) a push button (d) a motor
  9. 9.Which of these is an output? (a) a servo motor (b) a temperature sensor (c) a turning knob (d) a sound sensor
  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 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  11. 11.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  12. 12.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  13. 13.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.Which of these is an output? (a) a keypad (b) a push button (c) a water pump (d) a light sensor
  15. 15.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  16. 16.🔌 Is a sound sensor an input or an output for a microcontroller? (a) input (b) output
  17. 17.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  18. 18.🔍 Which is the odd one out? (a) an LED (b) a keypad (c) a servo motor (d) a speaker
  19. 19.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  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 7 LOW
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  21. 21.📶 Digital or analog: many values in a range? (a) analog (b) digital
  22. 22.Which of these is an input? (a) a motor (b) a buzzer (c) a sound sensor (d) a servo motor
  23. 23.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  24. 24.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  25. 25.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  26. 26.True or false: “a tilt switch: on or off” is a digital signal. (a) False (b) True
  27. 27.💡 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 HIGH
    set pin 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  28. 28.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  29. 29.💡 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) OFF (b) ON
  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 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  31. 31.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input
  32. 32.True or false: “how loud a sound is” is an analog signal. (a) True (b) False
  33. 33.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  36. 36.🔍 Which is the odd one out? (a) a small display (b) a servo motor (c) a turning knob (d) a motor
  37. 37.📶 A pin set LOW gives about … (a) 1.5 V (b) 0 V (c) 5 V (d) 9 V
  38. 38.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  39. 39.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  40. 40.True or false: “a door: open or shut” is a digital signal. (a) True (b) False

Answer key

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

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids