← Input and output pins lesson New set →

Electronics Worksheet: Input and Output Pins

Electronics lesson 22: Input and output pins · Set 286 · 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
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  2. 2.🔍 Which is the odd one out? (a) a turning knob (b) a water pump (c) a push button (d) a motion sensor
  3. 3.True or false: “a button: pressed or not” is an analog signal. (a) True (b) False
  4. 4.🔍 Which is the odd one out? (a) a push button (b) a keypad (c) a sound sensor (d) a small display
  5. 5.🔌 Is a buzzer an input or an output for a microcontroller? (a) input (b) output
  6. 6.🔍 Which is the odd one out? (a) a turning knob (b) a keypad (c) a sound sensor (d) a servo motor
  7. 7.💡 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 8 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  8. 8.Which of these is an input? (a) a buzzer (b) an LED (c) a speaker (d) a push button
  9. 9.💡 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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  10. 10.🔌 Is a keypad an input or an output for a microcontroller? (a) input (b) output
  11. 11.📶 On a 5 V board, a pin set HIGH gives about … (a) 0 V (b) 230 V (c) 5 V (d) 50 V
  12. 12.🔌 Is a motion sensor an input or an output for a microcontroller? (a) input (b) output
  13. 13.📶 Digital or analog: how loud a sound is? (a) digital (b) analog
  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 8 HIGH
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  15. 15.📶 Digital or analog: HIGH or LOW only? (a) digital (b) analog
  16. 16.Which of these is an output? (a) a servo motor (b) a sound sensor (c) a turning knob (d) a light sensor
  17. 17.True or false: “HIGH or LOW only” is a digital signal. (a) False (b) True
  18. 18.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  19. 19.🔌 Is a push button an input or an output for a microcontroller? (a) input (b) output
  20. 20.💡 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
    set pin 7 LOW
    set pin 8 LOW
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  21. 21.📶 A pin that reads a push button is set as … (a) a resistor (b) an input (c) an output (d) a battery
  22. 22.🔍 Which is the odd one out? (a) a buzzer (b) an LED (c) a small display (d) a turning knob
  23. 23.💡 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
    set pin 7 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  24. 24.💡 An LED (with its resistor) is on pin 8. 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
  25. 25.🔌 Is a servo motor an input or an output for a microcontroller? (a) output (b) input
  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 8 HIGH
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  27. 27.📶 Digital or analog: a knob turned part way? (a) analog (b) digital
  28. 28.True or false: “how loud a sound is” is a digital signal. (a) True (b) False
  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 7 LOW
    set pin 7 HIGH
    set pin 7 LOW
    set pin 8 HIGH
    Is the LED ON or OFF at the end?     (a) OFF (b) ON
  30. 30.Which of these is an output? (a) a water pump (b) a light sensor (c) a temperature sensor (d) a sound sensor
  31. 31.📶 Digital or analog: a tilt switch: on or off? (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 7 LOW
    set pin 7 LOW
    set pin 7 HIGH
    set pin 7 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  33. 33.🔌 Is an LED an input or an output for a microcontroller? (a) input (b) output
  34. 34.Which of these is an output? (a) a light sensor (b) a temperature sensor (c) a motion sensor (d) a small display
  35. 35.📶 Digital or analog: many values in a range? (a) analog (b) digital
  36. 36.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  37. 37.💡 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
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  38. 38.True or false: “a door: open or shut” is a digital signal. (a) False (b) True
  39. 39.💡 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 LOW
    Is the LED ON or OFF at the end?     (a) ON (b) OFF
  40. 40.🔍 Which is the odd one out? (a) a temperature sensor (b) a motion sensor (c) an LED (d) a push button

Answer key

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

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