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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 926 · 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.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds is a wait of 1.8 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many times does the LED blink in 12 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 9 seconds?
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds is a wait of 2.8 seconds?
  10. 10.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) blinks 500 times (d) pauses for half a second
  12. 12.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 10 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4.7 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 2 seconds?
  20. 20.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 5 seconds?
  27. 27.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  34. 34.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 18 seconds?
  37. 37.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 450 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 3 seconds?

Answer key

  1. 1.75
  2. 650
  3. 1800
  4. 6
  5. 1050
  6. 9
  7. 1000
  8. 2000
  9. 2800
  10. 5600
  11. pauses for half a second
  12. 1650
  13. 12
  14. 10
  15. 4700
  16. 12
  17. 750
  18. 15300
  19. 2
  20. 7200
  21. 1000
  22. 2200
  23. 5000
  24. 5400
  25. 5.25
  26. 5
  27. 7000
  28. 1450
  29. 850
  30. 8.25
  31. 8.5
  32. 32
  33. 10
  34. 3.5
  35. 1050
  36. 9
  37. 0.25
  38. 4.5
  39. 14
  40. 3000

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