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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 249 · 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 0.3 seconds?
  2. 2.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  3. 3.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 100 (d) 60
  5. 5.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  6. 6.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds is a wait of 4.9 seconds?
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ How many milliseconds is a wait of 3.8 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  17. 17.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 4.6 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 0.2 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 4.5 seconds?
  30. 30.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 1.4 seconds?
  34. 34.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 9750 ms”. How many seconds is that? =

Answer key

  1. 300
  2. pauses for half a second
  3. 1200
  4. 1000
  5. 2
  6. 5.25
  7. 2800
  8. 4900
  9. 9100
  10. 3800
  11. 5
  12. 30
  13. 3000
  14. 8
  15. 7700
  16. 36
  17. 3.25
  18. 4600
  19. 4
  20. 5.75
  21. 200
  22. 800
  23. 1000
  24. 6400
  25. 1.75
  26. 1200
  27. 900
  28. 2.5
  29. 4500
  30. 9.25
  31. 800
  32. 2400
  33. 1400
  34. 4.25
  35. 1350
  36. 9600
  37. 1600
  38. 8.5
  39. 1200
  40. 9.75

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