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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 310 · 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 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) turns the LED off (d) waits 500 seconds
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  11. 11.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 2.7 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 7 seconds?
  17. 17.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ How many milliseconds is a wait of 4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 12 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 0.4 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 3 seconds?
  23. 23.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 4.7 seconds?
  28. 28.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 1.9 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 4.3 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 0.8 seconds?
  39. 39.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?

Answer key

  1. 1150
  2. 14
  3. 20
  4. 40
  5. 550
  6. 1500
  7. 750
  8. 4400
  9. pauses for half a second
  10. 1000
  11. 2700
  12. 9
  13. 1300
  14. 16
  15. 2700
  16. 7
  17. 3600
  18. 4000
  19. 6
  20. 45
  21. 400
  22. 3
  23. 3.75
  24. 25
  25. 1650
  26. 4
  27. 4700
  28. 5.25
  29. 1900
  30. 12
  31. 9100
  32. 2800
  33. 7500
  34. 6.75
  35. 1100
  36. 8
  37. 4300
  38. 800
  39. 17000
  40. 10

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