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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 616 · 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.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1050 ms }
    How many times does the LED blink in 12 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 3.7 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  6. 6.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds is a wait of 3.3 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 0.9 seconds?
  12. 12.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 1050 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 8 seconds?
  16. 16.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 4.3 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  23. 23.⏱️ How many milliseconds is a wait of 3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 18 seconds?
  25. 25.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 0.3 seconds?
  29. 29.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 1.9 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 1.4 seconds?
  37. 37.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  39. 39.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 1000 ms”. How many seconds is that? =

Answer key

  1. 1600
  2. 6
  3. 3700
  4. 500
  5. pauses for half a second
  6. 4800
  7. 1100
  8. 10500
  9. 1150
  10. 3300
  11. 900
  12. 5.75
  13. 7000
  14. 45
  15. 4
  16. 4500
  17. 7.25
  18. 1400
  19. 4300
  20. 1150
  21. 1150
  22. 1000
  23. 3000
  24. 9
  25. 6.25
  26. 3
  27. 6
  28. 300
  29. 2.25
  30. 1450
  31. 6
  32. 1900
  33. 1000
  34. 16
  35. 1800
  36. 1400
  37. 1.75
  38. 2.75
  39. 9.5
  40. 1

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