Electronics Worksheet: What Is a Microcontroller

Electronics lesson 21: What is a microcontroller? · Set 170 · 40 questions

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.

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

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