← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 287 · 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 7 HIGH
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  2. 2.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  3. 3.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  4. 4.Which of these is an output? (a) a push button (b) a buzzer (c) a turning knob (d) a light sensor
  5. 5.True or false: “many values in a range” is a digital signal. (a) False (b) True
  6. 6.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  7. 7.Which of these is an output? (a) a sound sensor (b) a speaker (c) a keypad (d) a light sensor
  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
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  9. 9.True or false: “the room temperature” is a digital signal. (a) False (b) True
  10. 10.📶 A pin set LOW gives about … (a) 9 V (b) 1.5 V (c) 0 V (d) 5 V
  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 7 LOW
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  12. 12.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  13. 13.True or false: “how loud a sound is” is a digital signal. (a) False (b) True
  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 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  15. 15.🔍 Which is the odd one out? (a) an LED (b) a temperature sensor (c) a water pump (d) a buzzer
  16. 16.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  17. 17.💡 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
  18. 18.📶 A pin that reads a push button is set as … (a) an input (b) a battery (c) a resistor (d) an output
  19. 19.Which of these is an output? (a) a small display (b) a motion sensor (c) a keypad (d) a push button
  20. 20.Which of these is an input? (a) a motor (b) a temperature sensor (c) a speaker (d) an LED
  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 8 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 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
  23. 23.💡 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
    set pin 8 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.🔍 Which is the odd one out? (a) a turning knob (b) a motion sensor (c) a light sensor (d) an LED
  25. 25.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  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 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  27. 27.🔍 Which is the odd one out? (a) a push button (b) a keypad (c) a motion sensor (d) a motor
  28. 28.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  29. 29.📶 On a 5 V board, a pin set HIGH gives about … (a) 50 V (b) 5 V (c) 0 V (d) 230 V
  30. 30.💡 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 LOW
    set pin 7 LOW
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  31. 31.🔌 Is a small display an input or an output for a microcontroller? (a) output (b) input
  32. 32.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  33. 33.Which of these is an output? (a) a keypad (b) a temperature sensor (c) a motion sensor (d) an LED
  34. 34.True or false: “a door: open or shut” is an analog signal. (a) False (b) True
  35. 35.💡 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 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  36. 36.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  37. 37.🔍 Which is the odd one out? (a) a buzzer (b) a small display (c) a speaker (d) a light sensor
  38. 38.🔌 Is a motor an input or an output for a microcontroller? (a) input (b) output
  39. 39.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  40. 40.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input

Answer key

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

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