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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 568 · 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 950 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  3. 3.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 1 seconds?
  5. 5.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 1150 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  10. 10.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  15. 15.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ How many milliseconds is a wait of 0.1 seconds?
  18. 18.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ How many milliseconds is a wait of 0.6 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 4.5 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 0.4 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 20 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 18 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 0.5 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 1.5 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 1.7 seconds?
  39. 39.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 750 ms”. How many seconds is that? =

Answer key

  1. 1150
  2. pauses for half a second
  3. 15
  4. 1000
  5. 7
  6. 1
  7. 700
  8. 8.75
  9. 1000
  10. 9.75
  11. 4500
  12. 0.5
  13. 3600
  14. 15
  15. 6.5
  16. 900
  17. 100
  18. 8400
  19. 600
  20. 1000
  21. 4500
  22. 400
  23. 6
  24. 50
  25. 45
  26. 16
  27. 8100
  28. 14400
  29. 5600
  30. 500
  31. 500
  32. 4400
  33. 1050
  34. 8000
  35. 800
  36. 9
  37. 1500
  38. 1700
  39. 5.5
  40. 0.75

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