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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 979 · 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.⏱️ 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
  2. 2.⏱️ How many milliseconds is a wait of 2 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 8 seconds?
  5. 5.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 7 seconds?
  9. 9.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ How many milliseconds is a wait of 4.6 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 2.6 seconds?
  21. 21.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ How many milliseconds is a wait of 1.1 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 0.2 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 3.5 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 2.2 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 16 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ How many milliseconds is a wait of 1.9 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 4.1 seconds?
  38. 38.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 2000
  3. 1000
  4. 16
  5. 1.25
  6. 12
  7. 10500
  8. 14
  9. 3600
  10. 25
  11. 600
  12. 4000
  13. 1100
  14. 4600
  15. 4000
  16. 350
  17. 7.25
  18. 1000
  19. 1000
  20. 2600
  21. 8.5
  22. 5.75
  23. 2700
  24. 1100
  25. 200
  26. 3500
  27. 2200
  28. 1200
  29. 40
  30. 10
  31. 850
  32. 1400
  33. 1750
  34. 1900
  35. 40
  36. 1
  37. 4100
  38. 6.5
  39. 900
  40. 450

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