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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 343 · 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) blinks 500 times (c) pauses for half a second (d) turns the LED off
  2. 2.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  6. 6.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  12. 12.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 5 seconds?
  13. 13.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 14 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 1.4 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 14 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  31. 31.⏱️ How many milliseconds is a wait of 1.5 seconds?
  32. 32.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 10 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.7 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 2.5 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 250 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 1100
  3. 1.5
  4. 9000
  5. 40
  6. 4500
  7. 1800
  8. 1200
  9. 1050
  10. 1000
  11. 1000
  12. 5
  13. 5400
  14. 5.75
  15. 10800
  16. 10400
  17. 1200
  18. 1
  19. 4000
  20. 7
  21. 10
  22. 1400
  23. 35
  24. 250
  25. 2100
  26. 350
  27. 20
  28. 1350
  29. 1050
  30. 1.75
  31. 1500
  32. 5.25
  33. 4900
  34. 1100
  35. 10
  36. 4700
  37. 2500
  38. 200
  39. 5.5
  40. 0.25

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