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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 891 · 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) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  2. 2.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 3.9 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 0.8 seconds?
  11. 11.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  25. 25.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  26. 26.⏱️ How many milliseconds is a wait of 0.3 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 2.7 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 7 seconds?
  29. 29.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.8 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 1750 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 1150
  3. 0.5
  4. 5500
  5. 1500
  6. 6000
  7. 8500
  8. 8
  9. 3900
  10. 800
  11. 5
  12. 1050
  13. 1400
  14. 500
  15. 6.25
  16. 500
  17. 8.25
  18. 2
  19. 5.75
  20. 1000
  21. 25
  22. 8000
  23. 1100
  24. 45
  25. 0.75
  26. 300
  27. 2700
  28. 7
  29. 3200
  30. 7.25
  31. 1500
  32. 6.5
  33. 1400
  34. 28
  35. 1450
  36. 6.75
  37. 10
  38. 2800
  39. 1250
  40. 1.75

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