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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 691 · 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.⏱️ 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
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  3. 3.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  6. 6.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 4.9 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  13. 13.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 2 seconds?
  18. 18.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 4.4 seconds?
  21. 21.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 2.4 seconds?
  23. 23.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ How many milliseconds is a wait of 1.5 seconds?
  27. 27.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  35. 35.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 8 seconds?
  37. 37.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 20 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3.1 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 50
  3. 6
  4. 7200
  5. 1000
  6. 8
  7. 6.75
  8. 7500
  9. 8
  10. 8
  11. 4900
  12. 8
  13. 2
  14. 14
  15. 250
  16. 5.25
  17. 2
  18. 1400
  19. 40
  20. 4400
  21. 0.25
  22. 2400
  23. 2.5
  24. 8.5
  25. 1100
  26. 1500
  27. 7.5
  28. 2.25
  29. 700
  30. 45
  31. 600
  32. 600
  33. 1600
  34. 30
  35. 8.75
  36. 4
  37. 3200
  38. 50
  39. 3100
  40. 1150

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