Electronics Worksheet: What Is a Microcontroller

Electronics lesson 21: What is a microcontroller? · Set 270 · 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 part of a microcontroller board shows the board is on? (a) the USB port (b) the main chip (c) the reset button (d) the power LED
2. 2.Which job is done by the voltage regulator? (a) connect sensors and LEDs (b) brings power and code (c) restarts the program (d) keeps the voltage steady
3. 3.True or false: a microcontroller runs many apps at once. (a) False (b) True
4. 4.Which of these usually has a microcontroller inside? (a) a candle (b) a plain wall switch (c) a bicycle bell (d) a digital alarm clock
5. 5.🤖 Does a plain wall switch usually have a microcontroller inside? (a) No (b) Yes
6. 6.Which of these has no microcontroller inside? (a) a microwave oven (b) a washing machine (c) a digital thermometer (d) a plain wall switch
7. 7.Which of these has no microcontroller inside? (a) a digital alarm clock (b) a candle (c) a microwave oven (d) a washing machine
8. 8.🤖 Microcontroller or laptop: which one has a built-in keyboard? (a) laptop (b) microcontroller
9. 9.🤖 Microcontroller or laptop: which one needs much more power? (a) microcontroller (b) laptop
10. 10.True or false: a microwave oven has no microcontroller inside. (a) False (b) True
11. 11.🤖 Does a hand pump usually have a microcontroller inside? (a) Yes (b) No
12. 12.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
13. 13.True or false: a plain wall switch has no microcontroller inside. (a) True (b) False
14. 14.🧭 Which part of a microcontroller board runs the program? (a) the voltage regulator (b) the USB port (c) the pins (d) the main chip
15. 15.🧭 Which part of a microcontroller board connect sensors and LEDs? (a) the power LED (b) the voltage regulator (c) the reset button (d) the pins
16. 16.🤖 Does a microwave oven usually have a microcontroller inside? (a) No (b) Yes
17. 17.🤖 Does a washing machine usually have a microcontroller inside? (a) Yes (b) No
18. 18.🤖 Microcontroller or laptop: which one runs one small program? (a) microcontroller (b) laptop
19. 19.🤖 Does a wind-up toy usually have a microcontroller inside? (a) No (b) Yes
20. 20.True or false: a microcontroller runs one small program. (a) True (b) False
21. 21.🤖 Microcontroller or laptop: which one runs many apps at once? (a) laptop (b) microcontroller
22. 22.🤖 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
23. 23.Which job is done by the main chip? (a) restarts the program (b) shows the board is on (c) runs the program (d) keeps the voltage steady
24. 24.True or false: a laptop needs much more power. (a) False (b) True
25. 25.🤖 How does a new program get onto a microcontroller board? (a) sent by sound (b) drawn with a pen (c) uploaded over USB (d) typed on the chip
26. 26.True or false: a microcontroller uses very little power. (a) True (b) False
27. 27.Which job is done by the pins? (a) shows the board is on (b) brings power and code (c) connect sensors and LEDs (d) restarts the program
28. 28.True or false: a laptop runs one small program. (a) False (b) True
29. 29.🤖 Microcontroller or laptop: which one uses very little power? (a) laptop (b) microcontroller
30. 30.Which job is done by the power LED? (a) runs the program (b) connect sensors and LEDs (c) shows the board is on (d) keeps the voltage steady
31. 31.🤖 Where does the board keep its program when the power is off? (a) the resistor (b) flash memory (c) the power LED (d) the USB cable
32. 32.True or false: a laptop uses very little power. (a) False (b) True
33. 33.Which of these has no microcontroller inside? (a) a spinning top (b) a digital thermometer (c) a toy robot (d) a smart watch
34. 34.True or false: a spinning top usually has a microcontroller inside. (a) True (b) False
35. 35.True or false: a toy robot usually has a microcontroller inside. (a) False (b) True
36. 36.🤖 Which is a safe power source for a beginner microcontroller board? (a) bare mains wires (b) a 230 V cable (c) a wall socket directly (d) USB or a 9 V battery
37. 37.Which job is done by the reset button? (a) restarts the program (b) connect sensors and LEDs (c) brings power and code (d) runs the program
38. 38.True or false: a laptop has no screen of its own. (a) False (b) True
39. 39.Which of these usually has a microcontroller inside? (a) a hand pump (b) a plain wall switch (c) a spinning top (d) a TV remote
40. 40.True or false: a washing machine has no microcontroller inside. (a) True (b) False

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