← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 729 · 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 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 LOW
    set pin 8 LOW
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 230 V (c) 0 V (d) 5 V
  3. 3.🔌 Is a servo motor an input or an output for a microcontroller? (a) input (b) output
  4. 4.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  5. 5.🔌 Is a motion sensor 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 HIGH
    set pin 8 HIGH
    set pin 8 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  7. 7.🔍 Which is the odd one out? (a) a temperature sensor (b) a motion sensor (c) an LED (d) a keypad
  8. 8.💡 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
    set pin 7 LOW
    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 water pump (c) a servo motor (d) a push button
  10. 10.True or false: “a button: pressed or not” 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 LOW
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  12. 12.Which of these is an input? (a) a motor (b) a light sensor (c) a speaker (d) a buzzer
  13. 13.💡 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.🔌 Is a sound sensor an input or an output for a microcontroller? (a) output (b) input
  15. 15.📶 Digital or analog: a door: open or shut? (a) digital (b) analog
  16. 16.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 7 LOW
    set pin 8 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  17. 17.🔍 Which is the odd one out? (a) a temperature sensor (b) a keypad (c) a small display (d) a light sensor
  18. 18.🔍 Which is the odd one out? (a) a motor (b) a temperature sensor (c) a push button (d) a keypad
  19. 19.💡 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 7 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  20. 20.📶 Digital or analog: many values in a range? (a) digital (b) analog
  21. 21.Which of these is an input? (a) an LED (b) a motor (c) a small display (d) a motion sensor
  22. 22.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  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 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  24. 24.Which of these is an output? (a) a light sensor (b) an LED (c) a motion sensor (d) a keypad
  25. 25.🔍 Which is the odd one out? (a) a keypad (b) a water pump (c) a push button (d) a motion sensor
  26. 26.Which of these is an output? (a) a water pump (b) a light sensor (c) a keypad (d) a turning knob
  27. 27.True or false: “a tilt switch: on or off” is a digital signal. (a) True (b) False
  28. 28.Which of these is an output? (a) a servo motor (b) a turning knob (c) a motion sensor (d) a light sensor
  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 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  30. 30.💡 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 8 HIGH
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  31. 31.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  32. 32.🔍 Which is the odd one out? (a) an LED (b) a buzzer (c) a temperature sensor (d) a water pump
  33. 33.Which of these is an input? (a) a water pump (b) a servo motor (c) a buzzer (d) a temperature sensor
  34. 34.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  35. 35.📶 A pin that reads a push button is set as … (a) a battery (b) an input (c) a resistor (d) an output
  36. 36.💡 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 8 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  37. 37.💡 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 7 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.💡 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 LOW
    set pin 8 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  39. 39.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  40. 40.📶 A pin set LOW gives about … (a) 5 V (b) 1.5 V (c) 9 V (d) 0 V

Answer key

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

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