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Electronics Worksheet: What Is a Microcontroller

Electronics lesson 21: What is a microcontroller? · Set 420 · 40 questions
TalentJR

Remember (One chip, one job): Microcontroller = processor + memory + input/output pins on one chip. Board parts: USB port (power and code), pins, reset button, power LED, main chip, voltage regulator. Write the program → upload over USB → it runs its loop for ever; power by USB or a small battery.

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  1. 1.🤖 Which is a safe power source for a beginner microcontroller board? (a) a wall socket directly (b) bare mains wires (c) a 230 V cable (d) USB or a 9 V battery
  2. 2.Which of these usually has a microcontroller inside? (a) a hand pump (b) a wind-up toy (c) a bicycle bell (d) a washing machine
  3. 3.Which of these usually has a microcontroller inside? (a) a spinning top (b) a candle (c) a smart watch (d) a bicycle bell
  4. 4.🧭 Which part of a microcontroller board restarts the program? (a) the USB port (b) the voltage regulator (c) the reset button (d) the pins
  5. 5.True or false: a laptop has a built-in keyboard. (a) True (b) False
  6. 6.🤖 What is a microcontroller? (a) a type of battery (b) a kind of bulb (c) a big desktop computer (d) a computer on one chip
  7. 7.True or false: a microcontroller runs one small program. (a) False (b) True
  8. 8.Which of these has no microcontroller inside? (a) a smart watch (b) a digital alarm clock (c) a wind-up toy (d) a washing machine
  9. 9.🧭 Which part of a microcontroller board shows the board is on? (a) the reset button (b) the main chip (c) the power LED (d) the USB port
  10. 10.🤖 How does a new program get onto a microcontroller board? (a) drawn with a pen (b) sent by sound (c) typed on the chip (d) uploaded over USB
  11. 11.🤖 Does a toy robot usually have a microcontroller inside? (a) No (b) Yes
  12. 12.🤖 Does a microwave oven usually have a microcontroller inside? (a) Yes (b) No
  13. 13.True or false: a spinning top has no microcontroller inside. (a) False (b) True
  14. 14.🤖 Microcontroller or laptop: which one uses very little power? (a) microcontroller (b) laptop
  15. 15.🤖 Does a TV remote usually have a microcontroller inside? (a) No (b) Yes
  16. 16.True or false: a plain wall switch usually has a microcontroller inside. (a) True (b) False
  17. 17.🤖 Does a wind-up toy usually have a microcontroller inside? (a) Yes (b) No
  18. 18.Which of these has no microcontroller inside? (a) a digital thermometer (b) a microwave oven (c) a TV remote (d) a hand pump
  19. 19.🤖 Microcontroller or laptop: which one runs one small program? (a) microcontroller (b) laptop
  20. 20.🤖 Microcontroller or laptop: which one needs much more power? (a) microcontroller (b) laptop
  21. 21.🧭 Which part of a microcontroller board keeps the voltage steady? (a) the voltage regulator (b) the main chip (c) the power LED (d) the reset button
  22. 22.Which job is done by the USB port? (a) brings power and code (b) keeps the voltage steady (c) connect sensors and LEDs (d) runs the program
  23. 23.Which of these usually has a microcontroller inside? (a) a plain wall switch (b) a spinning top (c) a wind-up toy (d) a microwave oven
  24. 24.🧭 Which part of a microcontroller board brings power and code? (a) the pins (b) the reset button (c) the voltage regulator (d) the USB port
  25. 25.Which of these usually has a microcontroller inside? (a) a spinning top (b) a digital thermometer (c) a wind-up toy (d) a bicycle bell
  26. 26.🤖 Where does the board keep its program when the power is off? (a) the USB cable (b) the power LED (c) the resistor (d) flash memory
  27. 27.True or false: a wind-up toy has no microcontroller inside. (a) False (b) True
  28. 28.True or false: a TV remote has no microcontroller inside. (a) False (b) True
  29. 29.🧭 Which part of a microcontroller board runs the program? (a) the power LED (b) the USB port (c) the pins (d) the main chip
  30. 30.Which of these has no microcontroller inside? (a) a digital alarm clock (b) a microwave oven (c) a smart watch (d) a candle
  31. 31.True or false: a laptop has no screen of its own. (a) True (b) False
  32. 32.True or false: a microcontroller uses very little power. (a) False (b) True
  33. 33.🤖 When the main loop of a microcontroller program ends, what happens? (a) it stops forever (b) it starts again (c) it deletes itself (d) the board breaks
  34. 34.🧭 Which part of a microcontroller board connect sensors and LEDs? (a) the main chip (b) the reset button (c) the pins (d) the USB port
  35. 35.True or false: a digital alarm clock has no microcontroller inside. (a) True (b) False
  36. 36.Which job is done by the main chip? (a) keeps the voltage steady (b) shows the board is on (c) runs the program (d) connect sensors and LEDs
  37. 37.Which job is done by the power LED? (a) shows the board is on (b) brings power and code (c) keeps the voltage steady (d) restarts the program
  38. 38.🤖 Does a spinning top usually have a microcontroller inside? (a) No (b) Yes
  39. 39.🤖 Does a candle usually have a microcontroller inside? (a) No (b) Yes
  40. 40.True or false: a washing machine usually has a microcontroller inside. (a) False (b) True

Answer key

  1. USB or a 9 V battery
  2. a washing machine
  3. a smart watch
  4. the reset button
  5. True
  6. a computer on one chip
  7. True
  8. a wind-up toy
  9. the power LED
  10. uploaded over USB
  11. Yes
  12. Yes
  13. True
  14. microcontroller
  15. Yes
  16. False
  17. No
  18. a hand pump
  19. microcontroller
  20. laptop
  21. the voltage regulator
  22. brings power and code
  23. a microwave oven
  24. the USB port
  25. a digital thermometer
  26. flash memory
  27. True
  28. False
  29. the main chip
  30. a candle
  31. False
  32. True
  33. it starts again
  34. the pins
  35. False
  36. runs the program
  37. shows the board is on
  38. No
  39. No
  40. True

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