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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 618 · 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 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  3. 3.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 0.5 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  8. 8.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  12. 12.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 1.3 seconds?
  14. 14.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 4.2 seconds?
  25. 25.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  28. 28.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 3.3 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  32. 32.⏱️ How many milliseconds is a wait of 2.2 seconds?
  33. 33.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 4.3 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 4.6 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  39. 39.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 4500 ms”. How many seconds is that? =

Answer key

  1. 8
  2. 1000
  3. 950
  4. 2.5
  5. 500
  6. 500
  7. 25
  8. pauses for half a second
  9. 32
  10. 1050
  11. 8
  12. 7000
  13. 1300
  14. 8.5
  15. 1600
  16. 5.25
  17. 4.75
  18. 6.75
  19. 4000
  20. 4
  21. 500
  22. 8
  23. 20
  24. 4200
  25. 9.5
  26. 1000
  27. 12
  28. 8000
  29. 3300
  30. 600
  31. 5
  32. 2200
  33. 3.25
  34. 4300
  35. 4600
  36. 850
  37. 1350
  38. 7.75
  39. 4000
  40. 4.5

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