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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 7 · 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 750 ms; LED OFF; wait 1250 ms }
    How many times does the LED blink in 20 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 4 seconds?
  3. 3.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  6. 6.⏱️ How many milliseconds is a wait of 1.5 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 3.1 seconds?
  9. 9.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  12. 12.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 14 seconds?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 1 second?
  19. 19.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  21. 21.⏱️ How many milliseconds is a wait of 2.3 seconds?
  22. 22.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  24. 24.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 5 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 2.2 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ How many milliseconds is a wait of 4.7 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 3 seconds?
  36. 36.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 1.3 seconds?

Answer key

  1. 10
  2. 2
  3. 3600
  4. 7000
  5. pauses for half a second
  6. 1500
  7. 1050
  8. 3100
  9. 5200
  10. 30
  11. 1000
  12. 0.75
  13. 1.25
  14. 3.75
  15. 1700
  16. 7
  17. 4000
  18. 2
  19. 5.5
  20. 4
  21. 2300
  22. 6
  23. 12
  24. 1.5
  25. 950
  26. 28
  27. 10
  28. 2200
  29. 850
  30. 4700
  31. 1800
  32. 13000
  33. 1050
  34. 300
  35. 3
  36. 9.25
  37. 2
  38. 1.75
  39. 28
  40. 1300

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