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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 865 · 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 1.2 seconds?
  2. 2.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  6. 6.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  7. 7.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 4.4 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 2.7 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 5 seconds?
  12. 12.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 2.4 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 2.8 seconds?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  27. 27.⏱️ How many milliseconds is a wait of 1.3 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 3.5 seconds?
  29. 29.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  39. 39.⏱️ How many milliseconds is a wait of 2.3 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 0.9 seconds?

Answer key

  1. 1200
  2. 1.75
  3. 6.25
  4. 8.5
  5. 5
  6. pauses for half a second
  7. 5
  8. 4400
  9. 2700
  10. 1650
  11. 5
  12. 2.25
  13. 2400
  14. 2800
  15. 9800
  16. 1.5
  17. 2.75
  18. 1300
  19. 7000
  20. 1100
  21. 1050
  22. 500
  23. 4500
  24. 6300
  25. 11400
  26. 1000
  27. 1300
  28. 3500
  29. 9.25
  30. 900
  31. 3.25
  32. 2800
  33. 4.25
  34. 650
  35. 1250
  36. 1400
  37. 5
  38. 4
  39. 2300
  40. 900

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