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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 425 · 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 9000 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  3. 3.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 0.8 seconds?
  14. 14.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 3.5 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 1.2 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  19. 19.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 12 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 12 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  24. 24.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  25. 25.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  26. 26.⏱️ How many milliseconds is a wait of 4 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 5 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 4.1 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?

Answer key

  1. 9
  2. 1000
  3. 1
  4. 3.75
  5. 45
  6. 1100
  7. 17000
  8. 800
  9. 1050
  10. 8.25
  11. 900
  12. 800
  13. 800
  14. 9.5
  15. 7500
  16. 3500
  17. 1200
  18. 35
  19. 4500
  20. 1.25
  21. 6
  22. 30
  23. 16
  24. pauses for half a second
  25. 2.75
  26. 4000
  27. 5000
  28. 1100
  29. 1750
  30. 1450
  31. 6
  32. 15
  33. 4.25
  34. 10
  35. 4100
  36. 1100
  37. 24
  38. 35
  39. 900
  40. 5600

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