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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 804 · 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.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  3. 3.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) blinks 500 times (d) waits 500 seconds
  7. 7.⏱️ How many milliseconds is a wait of 1.1 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  11. 11.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 0.7 seconds?
  14. 14.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 3.3 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4.5 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 0.8 seconds?
  21. 21.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 1.4 seconds?
  26. 26.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?

Answer key

  1. 7200
  2. 12
  3. 12800
  4. 6.5
  5. 1350
  6. pauses for half a second
  7. 1100
  8. 1750
  9. 5
  10. 1000
  11. 7700
  12. 8000
  13. 700
  14. 6.75
  15. 3300
  16. 4500
  17. 45
  18. 1200
  19. 25
  20. 800
  21. 7.5
  22. 3300
  23. 14400
  24. 10
  25. 1400
  26. 4900
  27. 7700
  28. 700
  29. 6.25
  30. 5.5
  31. 2.5
  32. 1850
  33. 4
  34. 35
  35. 50
  36. 750
  37. 5400
  38. 14
  39. 1250
  40. 2000

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