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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 642 · 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 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 4.3 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  7. 7.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  9. 9.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  10. 10.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 0.1 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  20. 20.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  24. 24.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 5 seconds?
  27. 27.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 3.2 seconds?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?

Answer key

  1. 20
  2. 4300
  3. 25
  4. 1650
  5. 5.75
  6. 1000
  7. 900
  8. 5
  9. pauses for half a second
  10. 1
  11. 600
  12. 0.5
  13. 1150
  14. 1.5
  15. 100
  16. 1150
  17. 9.25
  18. 2
  19. 8
  20. 5.25
  21. 2400
  22. 1350
  23. 20
  24. 3600
  25. 3200
  26. 5000
  27. 8.75
  28. 1150
  29. 5
  30. 600
  31. 1450
  32. 6
  33. 1.25
  34. 1.75
  35. 500
  36. 7.25
  37. 3200
  38. 7500
  39. 850
  40. 12600

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