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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 135 · 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.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  2. 2.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 3.7 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 1050 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 16 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 8 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 1.2 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  8. 8.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  9. 9.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  10. 10.⏱️ How many milliseconds is a wait of 4.4 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 12 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  20. 20.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 5 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 20 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 1 seconds?
  25. 25.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  26. 26.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 0.4 seconds?
  30. 30.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 2.6 seconds?
  35. 35.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  38. 38.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 4.25
  2. 8.5
  3. 3700
  4. 8
  5. 16
  6. 1200
  7. 20
  8. 1
  9. pauses for half a second
  10. 4400
  11. 1450
  12. 6
  13. 1350
  14. 1750
  15. 1300
  16. 3
  17. 1900
  18. 0.75
  19. 4.5
  20. 9
  21. 1700
  22. 5000
  23. 50
  24. 1000
  25. 1000
  26. 1650
  27. 850
  28. 28
  29. 400
  30. 2700
  31. 3.5
  32. 8
  33. 3.75
  34. 2600
  35. 1800
  36. 1800
  37. 18
  38. 7000
  39. 2
  40. 950

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