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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 636 · 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.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  3. 3.⏱️ How many milliseconds is a wait of 2.3 seconds?
  4. 4.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 0.9 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 3.9 seconds?
  8. 8.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ 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
  12. 12.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  13. 13.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4 seconds?
  16. 16.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 1.3 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 2.7 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  20. 20.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  21. 21.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ How many milliseconds is a wait of 1.4 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 2.5 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ How many milliseconds is a wait of 2.6 seconds?
  31. 31.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 18 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 3.8 seconds?
  36. 36.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 10 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 4.7 seconds?
  39. 39.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 18 seconds?

Answer key

  1. 1200
  2. 1000
  3. 2300
  4. 6
  5. 1650
  6. 900
  7. 3900
  8. 8100
  9. 20
  10. 1650
  11. pauses for half a second
  12. 4
  13. 18
  14. 5
  15. 4000
  16. 6000
  17. 1300
  18. 2700
  19. 6
  20. 9
  21. 5.25
  22. 1050
  23. 1400
  24. 4
  25. 850
  26. 25
  27. 400
  28. 2500
  29. 700
  30. 2600
  31. 7000
  32. 4
  33. 45
  34. 28
  35. 3800
  36. 6.75
  37. 10
  38. 4700
  39. 4400
  40. 9

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