← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 612 · 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.📶 Digital or analog: how loud a sound is? (a) analog (b) digital
  2. 2.True or false: “HIGH or LOW only” is a digital signal. (a) True (b) False
  3. 3.💡 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 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  4. 4.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 50 V (c) 5 V (d) 0 V
  5. 5.🔍 Which is the odd one out? (a) a motion sensor (b) an LED (c) a temperature sensor (d) a keypad
  6. 6.💡 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 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  7. 7.True or false: “a button: pressed or not” is a digital signal. (a) False (b) True
  8. 8.💡 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 LOW
    set pin 7 LOW
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  9. 9.🔍 Which is the odd one out? (a) a keypad (b) a buzzer (c) a speaker (d) a motor
  10. 10.💡 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 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  11. 11.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  12. 12.True or false: “a tilt switch: on or off” is an analog signal. (a) True (b) False
  13. 13.📶 Digital or analog: a door: open or shut? (a) analog (b) digital
  14. 14.Which of these is an output? (a) a motion sensor (b) a small display (c) a keypad (d) a push button
  15. 15.🔌 Is a motion sensor an input or an output for a microcontroller? (a) output (b) input
  16. 16.🔍 Which is the odd one out? (a) a turning knob (b) a motion sensor (c) a servo motor (d) a temperature sensor
  17. 17.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  18. 18.🔌 Is a light sensor an input or an output for a microcontroller? (a) output (b) input
  19. 19.📶 How many states can a digital pin have? (a) ten (b) one (c) two (d) a thousand
  20. 20.💡 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
    set pin 7 LOW
    set pin 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  21. 21.💡 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
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  22. 22.🔍 Which is the odd one out? (a) a speaker (b) a light sensor (c) a keypad (d) a motion sensor
  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 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.📶 A pin that reads a push button is set as … (a) an output (b) an input (c) a resistor (d) a battery
  25. 25.Which of these is an output? (a) a water pump (b) a light sensor (c) a keypad (d) a temperature sensor
  26. 26.🔌 Is a water pump an input or an output for a microcontroller? (a) input (b) output
  27. 27.💡 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 7 HIGH
    set pin 8 LOW
    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 8 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  29. 29.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  30. 30.🔌 Is a small display an input or an output for a microcontroller? (a) input (b) output
  31. 31.💡 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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.🔍 Which is the odd one out? (a) a speaker (b) an LED (c) a buzzer (d) a push button
  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 8 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  34. 34.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  35. 35.📶 Digital or analog: a tilt switch: on or off? (a) analog (b) digital
  36. 36.🔌 Is a speaker an input or an output for a microcontroller? (a) output (b) input
  37. 37.Which of these is an input? (a) a motor (b) a small display (c) a turning knob (d) a buzzer
  38. 38.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  39. 39.💡 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 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  40. 40.🔌 Is a keypad an input or an output for a microcontroller? (a) output (b) input

Answer key

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

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