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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 571 · 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 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 3 seconds?
  3. 3.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) blinks 500 times (d) pauses for half a second
  4. 4.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds is a wait of 2.7 seconds?
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 2.3 seconds?
  11. 11.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 1.8 seconds?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 60 (d) 10
  16. 16.⏱️ How many milliseconds is a wait of 2.4 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 1.7 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 0.6 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 400 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.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 12 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 6 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 7 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 5 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 4.2 seconds?
  36. 36.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ How many milliseconds is a wait of 4.4 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 7500 ms”. How many seconds is that? =

Answer key

  1. 6600
  2. 3
  3. pauses for half a second
  4. 7000
  5. 4
  6. 2700
  7. 2200
  8. 1.75
  9. 3.75
  10. 2300
  11. 3.5
  12. 850
  13. 1800
  14. 3900
  15. 1000
  16. 2400
  17. 2
  18. 16
  19. 1700
  20. 500
  21. 600
  22. 1300
  23. 1400
  24. 2.25
  25. 10
  26. 30
  27. 1100
  28. 3
  29. 1250
  30. 750
  31. 8400
  32. 7
  33. 5000
  34. 600
  35. 4200
  36. 1800
  37. 4400
  38. 1500
  39. 11200
  40. 7.5

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