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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 547 · 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 are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  4. 4.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds is a wait of 3.5 seconds?
  7. 7.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  9. 9.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds is a wait of 1.3 seconds?
  12. 12.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  17. 17.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 3.8 seconds?
  20. 20.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 0.7 seconds?
  24. 24.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 0.2 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 3.7 seconds?
  27. 27.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 10 seconds?
  30. 30.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  40. 40.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1000
  2. 1150
  3. pauses for half a second
  4. 1750
  5. 10
  6. 3500
  7. 5.25
  8. 2
  9. 7000
  10. 500
  11. 1300
  12. 7.75
  13. 8.5
  14. 8
  15. 2400
  16. 7.5
  17. 20000
  18. 1200
  19. 3800
  20. 0.75
  21. 850
  22. 10
  23. 700
  24. 1800
  25. 200
  26. 3700
  27. 3600
  28. 2.75
  29. 5
  30. 9.5
  31. 4.5
  32. 24
  33. 1050
  34. 3
  35. 800
  36. 4.25
  37. 15
  38. 3500
  39. 50
  40. 13600

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