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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 553 · 40 questions
TalentJR

Remember (ON + OFF = one blink): 1 second = 1000 ms. One blink = ON wait + OFF wait. Blinks = total time in ms ÷ one blink; repeat n times takes n × one round.

NameDateTime takenScore ___ / 40
  1. 1.⏱️ How many milliseconds is a wait of 4.4 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  8. 8.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  10. 10.⏱️ How many milliseconds is a wait of 3.9 seconds?
  11. 11.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 3.1 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  19. 19.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 0.5 seconds?
  22. 22.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 3.3 seconds?
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 12 seconds?
  32. 32.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 1.6 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 2.6 seconds?

Answer key

  1. 4400
  2. 35
  3. 1300
  4. 8000
  5. 1350
  6. 12800
  7. 20
  8. 2
  9. 1000
  10. 3900
  11. 3000
  12. 2800
  13. 10
  14. 700
  15. 1200
  16. 3100
  17. 4500
  18. pauses for half a second
  19. 800
  20. 6
  21. 500
  22. 7.5
  23. 550
  24. 10000
  25. 3300
  26. 2000
  27. 1.5
  28. 4
  29. 850
  30. 1250
  31. 6
  32. 3000
  33. 3000
  34. 1600
  35. 450
  36. 8
  37. 5
  38. 600
  39. 4800
  40. 2600

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