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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 509 · 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.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) waits 500 seconds (d) pauses for half a second
  2. 2.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 5 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1450 ms }
    How many times does the LED blink in 20 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 4.4 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  12. 12.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 10 seconds?
  14. 14.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 3.3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 20 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 2.8 seconds?
  36. 36.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  38. 38.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  39. 39.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  40. 40.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 1750
  3. 7.5
  4. 9.75
  5. 1800
  6. 5000
  7. 700
  8. 4800
  9. 10
  10. 4400
  11. 1000
  12. 7000
  13. 10
  14. 6400
  15. 5
  16. 750
  17. 3500
  18. 4800
  19. 9
  20. 9000
  21. 40
  22. 45
  23. 3300
  24. 10
  25. 800
  26. 2.25
  27. 400
  28. 550
  29. 5400
  30. 1450
  31. 13500
  32. 9600
  33. 8400
  34. 450
  35. 2800
  36. 11200
  37. 50
  38. 0.25
  39. 2.75
  40. 1600

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