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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 643 · 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 4.3 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 3.6 seconds?
  3. 3.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds is a wait of 1.5 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 2.1 seconds?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  13. 13.⏱️ How many milliseconds is a wait of 4.2 seconds?
  14. 14.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 3.7 seconds?
  19. 19.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 4.8 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 0.9 seconds?
  25. 25.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 3 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 3.9 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 0.8 seconds?
  36. 36.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) pauses for half a second (d) blinks 500 times
  39. 39.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 7250 ms”. How many seconds is that? =

Answer key

  1. 4300
  2. 3600
  3. 4
  4. 4.5
  5. 1200
  6. 2000
  7. 4200
  8. 8000
  9. 450
  10. 1500
  11. 2100
  12. 1000
  13. 4200
  14. 7700
  15. 600
  16. 1500
  17. 5.25
  18. 3700
  19. 9.25
  20. 4800
  21. 2
  22. 4.25
  23. 16
  24. 900
  25. 5.75
  26. 2000
  27. 0.75
  28. 2100
  29. 3000
  30. 3900
  31. 500
  32. 2100
  33. 1500
  34. 12
  35. 800
  36. 6000
  37. 3600
  38. pauses for half a second
  39. 400
  40. 7.25

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