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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 305 · 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.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  4. 4.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 2 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ 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
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds is a wait of 0.9 seconds?
  13. 13.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 4.9 seconds?
  17. 17.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ How many milliseconds is a wait of 1.7 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 3.2 seconds?
  30. 30.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  32. 32.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 1100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 4.6 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 1150 ms }
    How many times does the LED blink in 12 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  39. 39.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. 8
  2. 15200
  3. 1000
  4. 2200
  5. 16
  6. 2000
  7. 800
  8. pauses for half a second
  9. 8400
  10. 2400
  11. 1000
  12. 900
  13. 3600
  14. 2000
  15. 9000
  16. 4900
  17. 5.25
  18. 35
  19. 1100
  20. 8
  21. 1.75
  22. 1250
  23. 1000
  24. 4
  25. 5.75
  26. 0.75
  27. 13600
  28. 1700
  29. 3200
  30. 8.75
  31. 25
  32. 4000
  33. 3
  34. 4600
  35. 6
  36. 8
  37. 4
  38. 9.25
  39. 11000
  40. 4800

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