← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 605 · 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: a tilt switch: on or off? (a) digital (b) analog
  2. 2.Which of these is an output? (a) a turning knob (b) a temperature sensor (c) a push button (d) a motor
  3. 3.📶 Digital or analog: the room temperature? (a) analog (b) digital
  4. 4.💡 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
  5. 5.🔌 Is a turning knob an input or an output for a microcontroller? (a) output (b) input
  6. 6.🔍 Which is the odd one out? (a) a motor (b) a motion sensor (c) a turning knob (d) a keypad
  7. 7.📶 Digital or analog: a knob turned part way? (a) digital (b) analog
  8. 8.True or false: “HIGH or LOW only” is an analog signal. (a) False (b) True
  9. 9.True or false: “how loud a sound is” is a digital signal. (a) True (b) False
  10. 10.💡 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) ON (b) OFF
  11. 11.📶 A pin set LOW gives about … (a) 5 V (b) 9 V (c) 1.5 V (d) 0 V
  12. 12.💡 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) OFF (b) ON
  13. 13.True or false: “how bright a room 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 8 HIGH
    set pin 8 HIGH
    set pin 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  15. 15.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  16. 16.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  17. 17.Which of these is an input? (a) a motor (b) a buzzer (c) a light sensor (d) a servo motor
  18. 18.📶 Digital or analog: many values in a range? (a) analog (b) digital
  19. 19.🔍 Which is the odd one out? (a) a water pump (b) a push button (c) a temperature sensor (d) a keypad
  20. 20.💡 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  21. 21.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    set pin 8 HIGH
    set pin 7 LOW
    set pin 7 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 motor (b) a sound sensor (c) a water pump (d) a servo motor
  23. 23.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  24. 24.📶 Digital or analog: a button: pressed or not? (a) digital (b) analog
  25. 25.📶 A pin that reads a push button is set as … (a) an output (b) an input (c) a battery (d) a resistor
  26. 26.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  27. 27.🔍 Which is the odd one out? (a) a motor (b) an LED (c) a turning knob (d) a speaker
  28. 28.🔍 Which is the odd one out? (a) a turning knob (b) a small display (c) a keypad (d) a light sensor
  29. 29.Which of these is an input? (a) a temperature sensor (b) a servo motor (c) a water pump (d) a small display
  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 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  31. 31.💡 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 7 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  32. 32.📶 Digital or analog: HIGH or LOW only? (a) analog (b) digital
  33. 33.💡 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 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  34. 34.🔌 Is a push button an input or an output for a microcontroller? (a) output (b) input
  35. 35.💡 An LED (with its resistor) is on pin 8. All pins start LOW. The program runs once:
    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
  36. 36.🔌 Is a water pump an input or an output for a microcontroller? (a) output (b) input
  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 7 HIGH
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  38. 38.📶 On a 5 V board, a pin set HIGH gives about … (a) 230 V (b) 50 V (c) 0 V (d) 5 V
  39. 39.🔌 Is a temperature sensor an input or an output for a microcontroller? (a) output (b) input
  40. 40.True or false: “many values in a range” is a digital signal. (a) False (b) True

Answer key

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

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