← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 647 · 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 7 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.Which of these is an input? (a) a push button (b) a buzzer (c) a servo motor (d) an LED
  3. 3.🔍 Which is the odd one out? (a) a temperature sensor (b) a motion sensor (c) a motor (d) a sound sensor
  4. 4.📶 Digital or analog: the room temperature? (a) digital (b) analog
  5. 5.💡 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
  6. 6.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  7. 7.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  8. 8.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  9. 9.📶 A pin set LOW gives about … (a) 5 V (b) 0 V (c) 1.5 V (d) 9 V
  10. 10.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  11. 11.Which of these is an output? (a) a light sensor (b) a water pump (c) a temperature sensor (d) a keypad
  12. 12.🔍 Which is the odd one out? (a) a temperature sensor (b) a small display (c) a water pump (d) an LED
  13. 13.Which of these is an input? (a) a servo motor (b) a motion sensor (c) a speaker (d) an LED
  14. 14.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 5 V (c) 50 V (d) 0 V
  15. 15.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  16. 16.True or false: “a knob turned part way” is an analog signal. (a) False (b) True
  17. 17.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 8 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  18. 18.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  19. 19.💡 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 8 LOW
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  20. 20.True or false: “many values in a range” is an analog signal. (a) False (b) True
  21. 21.🔍 Which is the odd one out? (a) a push button (b) a sound sensor (c) an LED (d) a motion sensor
  22. 22.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  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 8 LOW
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.Which of these is an input? (a) a light sensor (b) a motor (c) an LED (d) a small display
  25. 25.Which of these is an output? (a) a keypad (b) a buzzer (c) a turning knob (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 7 LOW
    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
  27. 27.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  28. 28.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  29. 29.📶 How many states can a digital pin have? (a) a thousand (b) ten (c) two (d) one
  30. 30.🔍 Which is the odd one out? (a) a turning knob (b) a small display (c) a sound sensor (d) a motion sensor
  31. 31.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  32. 32.Which of these is an output? (a) a turning knob (b) a small display (c) a temperature sensor (d) a light sensor
  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 7 LOW
    set pin 7 LOW
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  34. 34.📶 A pin that reads a push button is set as … (a) an output (b) a battery (c) a resistor (d) an input
  35. 35.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  36. 36.🔍 Which is the odd one out? (a) a temperature sensor (b) a speaker (c) a turning knob (d) a sound sensor
  37. 37.Which of these is an input? (a) a speaker (b) a small display (c) a turning knob (d) a motor
  38. 38.True or false: “a door: open or shut” is an analog signal. (a) True (b) False
  39. 39.💡 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
    set pin 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  40. 40.📶 Digital or analog: how bright a room is? (a) analog (b) digital

Answer key

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

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