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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 411 · 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.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  5. 5.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ 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
  9. 9.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  11. 11.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  15. 15.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  16. 16.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 0.2 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 4.9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 2.9 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  27. 27.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  30. 30.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 500 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 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 8000
  2. 600
  3. 5.75
  4. 1000
  5. 16000
  6. 6.5
  7. 2000
  8. pauses for half a second
  9. 2700
  10. 6
  11. 1200
  12. 8400
  13. 7.75
  14. 10
  15. 1.75
  16. 12800
  17. 200
  18. 4900
  19. 4
  20. 10500
  21. 4.5
  22. 2900
  23. 1100
  24. 1.5
  25. 20
  26. 10
  27. 0.25
  28. 3200
  29. 8
  30. 2.75
  31. 5.25
  32. 9
  33. 600
  34. 7000
  35. 1450
  36. 4.25
  37. 5
  38. 5
  39. 18
  40. 900

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