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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 44 · 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 1000 ms”. How many seconds is that? =
  2. 2.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 1.9 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ 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
  9. 9.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  12. 12.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 16 seconds?
  19. 19.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 4 seconds?
  21. 21.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 20 seconds?
  24. 24.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 2.5 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  34. 34.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 6 seconds?
  40. 40.⏱️ A program says “wait 6500 ms”. How many seconds is that? =

Answer key

  1. 1
  2. 9.75
  3. 1900
  4. 24
  5. 600
  6. 4200
  7. 5600
  8. pauses for half a second
  9. 2200
  10. 7000
  11. 1000
  12. 7.5
  13. 8.75
  14. 9.25
  15. 1050
  16. 25
  17. 11200
  18. 40
  19. 2
  20. 4000
  21. 1800
  22. 8400
  23. 10
  24. 0.25
  25. 24
  26. 2500
  27. 2400
  28. 11700
  29. 1050
  30. 1800
  31. 8.25
  32. 6300
  33. 3.75
  34. 3500
  35. 8400
  36. 10800
  37. 5
  38. 900
  39. 3
  40. 6.5

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