← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 193 · 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 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.Which of these is an output? (a) a keypad (b) a buzzer (c) a temperature sensor (d) a motion sensor
  3. 3.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  4. 4.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 5 V (c) 50 V (d) 0 V
  5. 5.🔌 Is an LED an input or an output for a microcontroller? (a) output (b) input
  6. 6.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 LOW
    set pin 7 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  7. 7.🔍 Which is the odd one out? (a) a turning knob (b) a light sensor (c) a small display (d) a push button
  8. 8.💡 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
  9. 9.Which of these is an input? (a) a motor (b) a sound sensor (c) a water pump (d) a servo motor
  10. 10.True or false: “how loud a sound is” is an analog signal. (a) False (b) True
  11. 11.💡 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
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  12. 12.True or false: “a tilt switch: on or off” is an analog signal. (a) False (b) True
  13. 13.💡 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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.Which of these is an output? (a) a push button (b) a temperature sensor (c) a servo motor (d) a turning knob
  15. 15.🔍 Which is the odd one out? (a) an LED (b) a servo motor (c) a water pump (d) a keypad
  16. 16.💡 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 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  17. 17.📶 A pin that reads a push button is set as … (a) an input (b) a battery (c) an output (d) a resistor
  18. 18.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  19. 19.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  20. 20.💡 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) OFF (b) ON
  21. 21.📶 How many states can a digital pin have? (a) two (b) a thousand (c) ten (d) one
  22. 22.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  23. 23.💡 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
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  24. 24.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  25. 25.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  26. 26.Which of these is an input? (a) a small display (b) a motor (c) a turning knob (d) a buzzer
  27. 27.Which of these is an input? (a) a buzzer (b) a small display (c) a motion sensor (d) a water pump
  28. 28.Which of these is an output? (a) a keypad (b) a light sensor (c) a temperature sensor (d) a small display
  29. 29.🔍 Which is the odd one out? (a) a keypad (b) a motion sensor (c) a buzzer (d) a temperature sensor
  30. 30.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  31. 31.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  32. 32.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input
  33. 33.💡 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) OFF (b) ON
  34. 34.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  35. 35.🔍 Which is the odd one out? (a) a turning knob (b) a water pump (c) a buzzer (d) an LED
  36. 36.Which of these is an output? (a) a water pump (b) a push button (c) a turning knob (d) a motion sensor
  37. 37.🔍 Which is the odd one out? (a) a turning knob (b) a sound sensor (c) a speaker (d) a keypad
  38. 38.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  40. 40.📶 Digital or analog: a knob turned part way? (a) digital (b) analog

Answer key

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

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