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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 86 · 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 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 4.8 seconds?
  3. 3.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  4. 4.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 4.4 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 1.3 seconds?
  10. 10.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  12. 12.⏱️ How many milliseconds is a wait of 3.6 seconds?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 18 seconds?
  17. 17.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  24. 24.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 2.8 seconds?
  33. 33.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 3.8 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 10 seconds?
  36. 36.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  37. 37.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 2.9 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  40. 40.⏱️ A program says “wait 3000 ms”. How many seconds is that? =

Answer key

  1. 30
  2. 4800
  3. pauses for half a second
  4. 3.75
  5. 1000
  6. 4400
  7. 1250
  8. 0.25
  9. 1300
  10. 1.5
  11. 1000
  12. 3600
  13. 3200
  14. 1500
  15. 2
  16. 9
  17. 11200
  18. 900
  19. 18
  20. 400
  21. 2200
  22. 4000
  23. 12
  24. 11000
  25. 11000
  26. 1000
  27. 7
  28. 1450
  29. 500
  30. 800
  31. 35
  32. 2800
  33. 2400
  34. 3800
  35. 5
  36. 7
  37. 5400
  38. 2900
  39. 9
  40. 3

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