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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 93 · 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 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 9 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  4. 4.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  5. 5.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) waits 500 seconds (d) pauses for half a second
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 3.9 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 3.5 seconds?
  17. 17.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 4.2 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 3.4 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 3 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 18 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 4.4 seconds?
  32. 32.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 20 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 1 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.7 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  38. 38.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 2750 ms”. How many seconds is that? =

Answer key

  1. 9
  2. 1000
  3. 5
  4. 8
  5. pauses for half a second
  6. 4
  7. 450
  8. 4
  9. 650
  10. 1500
  11. 900
  12. 9.25
  13. 5.25
  14. 3900
  15. 1000
  16. 3500
  17. 13000
  18. 5.75
  19. 4200
  20. 1750
  21. 3400
  22. 3
  23. 1350
  24. 1.25
  25. 3.75
  26. 10000
  27. 1.75
  28. 4.75
  29. 12
  30. 9
  31. 4400
  32. 3
  33. 300
  34. 50
  35. 1000
  36. 4700
  37. 5
  38. 5400
  39. 3.5
  40. 2.75

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