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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 486 · 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 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 16 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  3. 3.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 16 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 1.9 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 1050 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 2 seconds?
  12. 12.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  13. 13.⏱️ How many milliseconds is a wait of 1.3 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 3 seconds?
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 0.5 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 4.3 seconds?
  18. 18.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 3.6 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 5 seconds?
  28. 28.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  35. 35.⏱️ How many milliseconds is a wait of 0.9 seconds?
  36. 36.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 3.8 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 1100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 16 seconds?

Answer key

  1. 40
  2. 1000
  3. 8
  4. 1900
  5. 10
  6. 1600
  7. 2.5
  8. 1050
  9. 40
  10. 1600
  11. 1
  12. pauses for half a second
  13. 1300
  14. 3000
  15. 13000
  16. 500
  17. 4300
  18. 7000
  19. 8
  20. 3600
  21. 850
  22. 0.75
  23. 7.5
  24. 900
  25. 8.5
  26. 6
  27. 5000
  28. 4800
  29. 5.25
  30. 7
  31. 200
  32. 7.75
  33. 1
  34. 3.75
  35. 900
  36. 2000
  37. 800
  38. 12000
  39. 3800
  40. 8

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