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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 98 · 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.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  2. 2.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds is a wait of 0.4 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  6. 6.⏱️ How many milliseconds is a wait of 1.4 seconds?
  7. 7.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 14 seconds?
  9. 9.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  14. 14.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 3.5 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1450 ms }
    How many times does the LED blink in 12 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 4.2 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 1.9 seconds?
  22. 22.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  32. 32.⏱️ How many milliseconds is a wait of 4.6 seconds?
  33. 33.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  34. 34.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 2.3 seconds?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 4 seconds?

Answer key

  1. 1000
  2. 1050
  3. 400
  4. 10
  5. pauses for half a second
  6. 1400
  7. 2.25
  8. 7
  9. 6600
  10. 9.75
  11. 5600
  12. 5
  13. 50
  14. 0.75
  15. 1
  16. 10
  17. 3500
  18. 1600
  19. 6
  20. 4200
  21. 1900
  22. 8
  23. 35
  24. 1400
  25. 500
  26. 950
  27. 3600
  28. 300
  29. 5500
  30. 4200
  31. 4
  32. 4600
  33. 7.75
  34. 4800
  35. 1.75
  36. 8
  37. 2300
  38. 6500
  39. 6
  40. 2

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