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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 605 · 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.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds is a wait of 0.8 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 10 (d) 60
  7. 7.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 3.5 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 2.4 seconds?
  14. 14.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 18 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 6 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 2 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 1.2 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 1 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 2.5 seconds?
  24. 24.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  30. 30.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 2.2 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 1.7 seconds?
  35. 35.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 7 seconds?
  37. 37.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  39. 39.⏱️ How many milliseconds is a wait of 1.5 seconds?
  40. 40.⏱️ A program says “wait 4500 ms”. How many seconds is that? =

Answer key

  1. 1350
  2. 12000
  3. 3900
  4. 800
  5. 32
  6. 1000
  7. 12600
  8. pauses for half a second
  9. 35
  10. 3500
  11. 900
  12. 2.5
  13. 2400
  14. 7200
  15. 45
  16. 40
  17. 3
  18. 5
  19. 6400
  20. 2000
  21. 1200
  22. 1000
  23. 2500
  24. 6
  25. 3.75
  26. 1.25
  27. 3000
  28. 0.5
  29. 4
  30. 8
  31. 6400
  32. 900
  33. 2200
  34. 1700
  35. 5600
  36. 7
  37. 5.5
  38. 1.75
  39. 1500
  40. 4.5

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