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Electronics Worksheet: What Is a Microcontroller

Electronics lesson 21: What is a microcontroller? · Set 42 · 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 of these has no microcontroller inside? (a) a washing machine (b) a microwave oven (c) a wind-up toy (d) a digital thermometer
  2. 2.🤖 Microcontroller or laptop: which one has a built-in keyboard? (a) laptop (b) microcontroller
  3. 3.🤖 What is a microcontroller? (a) a type of battery (b) a computer on one chip (c) a kind of bulb (d) a big desktop computer
  4. 4.True or false: a microwave oven has no microcontroller inside. (a) True (b) False
  5. 5.🧭 Which part of a microcontroller board keeps the voltage steady? (a) the voltage regulator (b) the pins (c) the USB port (d) the power LED
  6. 6.True or false: a microcontroller runs one small program. (a) False (b) True
  7. 7.🤖 How does a new program get onto a microcontroller board? (a) drawn with a pen (b) typed on the chip (c) uploaded over USB (d) sent by sound
  8. 8.🤖 When the main loop of a microcontroller program ends, what happens? (a) the board breaks (b) it stops forever (c) it starts again (d) it deletes itself
  9. 9.Which job is done by the power LED? (a) connect sensors and LEDs (b) restarts the program (c) shows the board is on (d) keeps the voltage steady
  10. 10.Which of these usually has a microcontroller inside? (a) a TV remote (b) a wind-up toy (c) a plain wall switch (d) a bicycle bell
  11. 11.Which job is done by the pins? (a) shows the board is on (b) keeps the voltage steady (c) connect sensors and LEDs (d) runs the program
  12. 12.🤖 Does a candle usually have a microcontroller inside? (a) Yes (b) No
  13. 13.🤖 Does a wind-up toy usually have a microcontroller inside? (a) No (b) Yes
  14. 14.True or false: a digital thermometer usually has a microcontroller inside. (a) False (b) True
  15. 15.True or false: a microcontroller uses very little power. (a) False (b) True
  16. 16.True or false: a laptop runs one small program. (a) False (b) True
  17. 17.🤖 Does a washing machine usually have a microcontroller inside? (a) No (b) Yes
  18. 18.🤖 Does a toy robot usually have a microcontroller inside? (a) No (b) Yes
  19. 19.Which job is done by the main chip? (a) keeps the voltage steady (b) runs the program (c) shows the board is on (d) brings power and code
  20. 20.🤖 Does a microwave oven usually have a microcontroller inside? (a) No (b) Yes
  21. 21.True or false: a washing machine has no microcontroller inside. (a) False (b) True
  22. 22.True or false: a laptop has a built-in keyboard. (a) True (b) False
  23. 23.🤖 Does a spinning top usually have a microcontroller inside? (a) Yes (b) No
  24. 24.True or false: a smart watch usually has a microcontroller inside. (a) True (b) False
  25. 25.True or false: a hand pump usually has a microcontroller inside. (a) False (b) True
  26. 26.🤖 Does a smart watch usually have a microcontroller inside? (a) Yes (b) No
  27. 27.True or false: a laptop runs many apps at once. (a) True (b) False
  28. 28.🧭 Which part of a microcontroller board shows the board is on? (a) the voltage regulator (b) the pins (c) the power LED (d) the main chip
  29. 29.True or false: a TV remote has no microcontroller inside. (a) True (b) False
  30. 30.Which of these has no microcontroller inside? (a) a microwave oven (b) a smart watch (c) a washing machine (d) a spinning top
  31. 31.🧭 Which part of a microcontroller board connect sensors and LEDs? (a) the voltage regulator (b) the USB port (c) the power LED (d) the pins
  32. 32.True or false: a laptop has no screen of its own. (a) False (b) True
  33. 33.🧭 Which part of a microcontroller board restarts the program? (a) the reset button (b) the power LED (c) the pins (d) the voltage regulator
  34. 34.🤖 Where does the board keep its program when the power is off? (a) flash memory (b) the USB cable (c) the power LED (d) the resistor
  35. 35.Which job is done by the reset button? (a) runs the program (b) keeps the voltage steady (c) connect sensors and LEDs (d) restarts the program
  36. 36.Which job is done by the USB port? (a) runs the program (b) brings power and code (c) connect sensors and LEDs (d) shows the board is on
  37. 37.True or false: a candle usually has a microcontroller inside. (a) False (b) True
  38. 38.True or false: a microcontroller runs many apps at once. (a) True (b) False
  39. 39.🤖 Does a TV remote usually have a microcontroller inside? (a) No (b) Yes
  40. 40.Which of these usually has a microcontroller inside? (a) a spinning top (b) a hand pump (c) a digital alarm clock (d) a bicycle bell

Answer key

  1. a wind-up toy
  2. laptop
  3. a computer on one chip
  4. False
  5. the voltage regulator
  6. True
  7. uploaded over USB
  8. it starts again
  9. shows the board is on
  10. a TV remote
  11. connect sensors and LEDs
  12. No
  13. No
  14. True
  15. True
  16. False
  17. Yes
  18. Yes
  19. runs the program
  20. Yes
  21. False
  22. True
  23. No
  24. True
  25. False
  26. Yes
  27. True
  28. the power LED
  29. False
  30. a spinning top
  31. the pins
  32. False
  33. the reset button
  34. flash memory
  35. restarts the program
  36. brings power and code
  37. False
  38. False
  39. Yes
  40. a digital alarm clock

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