← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 681 · 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.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  2. 2.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  3. 3.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  4. 4.📶 A pin that reads a push button is set as … (a) a battery (b) an output (c) an input (d) a resistor
  5. 5.Which of these is an input? (a) a keypad (b) a servo motor (c) a small display (d) a speaker
  6. 6.💡 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 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  7. 7.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  8. 8.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    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) ON (b) OFF
  9. 9.🔍 Which is the odd one out? (a) a light sensor (b) an LED (c) a motor (d) a buzzer
  10. 10.Which of these is an output? (a) a motion sensor (b) a sound sensor (c) a keypad (d) a servo motor
  11. 11.Which of these is an output? (a) a light sensor (b) a buzzer (c) a temperature sensor (d) a push button
  12. 12.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  13. 13.🔍 Which is the odd one out? (a) a turning knob (b) a push button (c) a motor (d) a motion sensor
  14. 14.Which of these is an input? (a) a motor (b) a temperature sensor (c) a buzzer (d) an LED
  15. 15.🔍 Which is the odd one out? (a) a push button (b) a small display (c) a temperature sensor (d) a keypad
  16. 16.💡 An LED (with its resistor) is on pin 8. 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
  17. 17.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  18. 18.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    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
  19. 19.Which of these is an output? (a) a motion sensor (b) a push button (c) a speaker (d) a turning knob
  20. 20.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  21. 21.📶 Digital or analog: many values in a range? (a) analog (b) digital
  22. 22.True or false: “how bright a room is” is a digital signal. (a) True (b) False
  23. 23.🔌 Is a speaker an input or an output for a microcontroller? (a) input (b) output
  24. 24.Which of these is an input? (a) a motor (b) a light sensor (c) a speaker (d) a water pump
  25. 25.🔍 Which is the odd one out? (a) a water pump (b) a buzzer (c) a small display (d) a push button
  26. 26.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 LOW
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  27. 27.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  28. 28.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  29. 29.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  30. 30.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  31. 31.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 5 V (c) 230 V (d) 50 V
  32. 32.💡 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 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  33. 33.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  34. 34.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  35. 35.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  36. 36.🔍 Which is the odd one out? (a) a small display (b) a servo motor (c) a buzzer (d) a temperature sensor
  37. 37.🔌 Is a buzzer an input or an output for a microcontroller? (a) output (b) input
  38. 38.📶 A pin set LOW gives about … (a) 5 V (b) 9 V (c) 1.5 V (d) 0 V
  39. 39.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  40. 40.Which of these is an input? (a) a motion sensor (b) a speaker (c) a water pump (d) a buzzer

Answer key

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

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