← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 507 · 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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.📶 Digital or analog: a button: pressed or not? (a) analog (b) digital
  3. 3.💡 An LED (with its resistor) is on pin 7. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 7 LOW
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  4. 4.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 230 V (c) 50 V (d) 5 V
  5. 5.True or false: “how loud a sound is” is an analog signal. (a) False (b) True
  6. 6.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  7. 7.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  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 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  9. 9.📶 A pin that reads a push button is set as … (a) a resistor (b) a battery (c) an input (d) an output
  10. 10.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  11. 11.Which of these is an output? (a) a keypad (b) a temperature sensor (c) a buzzer (d) a motion sensor
  12. 12.Which of these is an output? (a) a sound sensor (b) a light sensor (c) a keypad (d) a motor
  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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  14. 14.💡 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 LOW
    set pin 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) input (b) output
  16. 16.🔍 Which is the odd one out? (a) a temperature sensor (b) a sound sensor (c) a servo motor (d) a light sensor
  17. 17.🔍 Which is the odd one out? (a) a small display (b) a buzzer (c) an LED (d) a push button
  18. 18.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 7 HIGH
    set pin 8 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 8. All pins start LOW. The program runs once:
    set pin 8 LOW
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  20. 20.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  21. 21.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  23. 23.📶 Digital or analog: many values in a range? (a) digital (b) analog
  24. 24.💡 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
  25. 25.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  26. 26.📶 A pin set LOW gives about … (a) 1.5 V (b) 5 V (c) 9 V (d) 0 V
  27. 27.Which of these is an output? (a) a sound sensor (b) a small display (c) a motion sensor (d) a light sensor
  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 HIGH
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  29. 29.🔍 Which is the odd one out? (a) a small display (b) a water pump (c) a turning knob (d) a servo motor
  30. 30.📶 Digital or analog: how bright a room is? (a) digital (b) analog
  31. 31.📶 Digital or analog: the room temperature? (a) analog (b) digital
  32. 32.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  33. 33.💡 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 7 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.Which of these is an input? (a) an LED (b) a temperature sensor (c) a speaker (d) a small display
  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
    set pin 8 LOW
    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 water pump (c) a buzzer (d) a light sensor
  37. 37.💡 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 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.Which of these is an output? (a) a keypad (b) a sound sensor (c) a push button (d) an LED
  39. 39.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  40. 40.True or false: “how bright a room is” is an analog signal. (a) True (b) False

Answer key

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

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