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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 328 · 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 1.7 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 4 seconds?
  3. 3.⏱️ 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
  4. 4.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  6. 6.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 20 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  12. 12.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 4.8 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 2 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 3.9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  25. 25.⏱️ How many milliseconds is a wait of 3.4 seconds?
  26. 26.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  28. 28.⏱️ How many milliseconds is a wait of 2.8 seconds?
  29. 29.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 1 second?
  32. 32.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 0.7 seconds?
  38. 38.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  39. 39.⏱️ How many milliseconds is a wait of 2.7 seconds?
  40. 40.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1700
  2. 4000
  3. pauses for half a second
  4. 1300
  5. 20
  6. 7700
  7. 4500
  8. 1
  9. 800
  10. 50
  11. 1000
  12. 8.75
  13. 45
  14. 4800
  15. 12
  16. 2000
  17. 20
  18. 3900
  19. 12
  20. 1800
  21. 2000
  22. 1
  23. 3.25
  24. 8
  25. 3400
  26. 2800
  27. 5
  28. 2800
  29. 2000
  30. 10800
  31. 2
  32. 950
  33. 2.75
  34. 750
  35. 1300
  36. 250
  37. 700
  38. 7.25
  39. 2700
  40. 5000

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