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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 345 · 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.⏱️ How many milliseconds is a wait of 4.1 seconds?
  2. 2.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 0.8 seconds?
  4. 4.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 9 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 1.6 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 20 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 3 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  21. 21.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  22. 22.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 8 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 0.2 seconds?
  27. 27.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 5 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 1.4 seconds?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 5750 ms”. How many seconds is that? =

Answer key

  1. 4100
  2. 2.25
  3. 800
  4. 9.5
  5. 400
  6. 7.25
  7. 3.75
  8. 7.5
  9. 9
  10. 1600
  11. 1450
  12. 1450
  13. 7000
  14. 1400
  15. 1200
  16. pauses for half a second
  17. 50
  18. 3000
  19. 30
  20. 15
  21. 1000
  22. 6000
  23. 5000
  24. 3600
  25. 4
  26. 200
  27. 9.25
  28. 3900
  29. 4.25
  30. 10
  31. 3800
  32. 8400
  33. 12000
  34. 12000
  35. 5
  36. 1400
  37. 600
  38. 700
  39. 1800
  40. 5.75

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