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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 8 · 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 6500 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds is a wait of 2.9 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 2.5 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 1 second?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  6. 6.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 2.6 seconds?
  10. 10.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) pauses for half a second (d) blinks 500 times
  11. 11.⏱️ How many milliseconds is a wait of 3.5 seconds?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ How many milliseconds is a wait of 0.8 seconds?
  15. 15.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 0.3 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 2.2 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 4.6 seconds?
  22. 22.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 16 seconds?
  30. 30.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 10 seconds?
  35. 35.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 4.8 seconds?

Answer key

  1. 6.5
  2. 2900
  3. 2500
  4. 1
  5. 5
  6. 8
  7. 6000
  8. 1450
  9. 2600
  10. pauses for half a second
  11. 3500
  12. 1000
  13. 550
  14. 800
  15. 11700
  16. 12000
  17. 45
  18. 300
  19. 4
  20. 2200
  21. 4600
  22. 0.75
  23. 7.75
  24. 800
  25. 1600
  26. 3.25
  27. 450
  28. 6400
  29. 40
  30. 9.75
  31. 3.75
  32. 1500
  33. 750
  34. 10
  35. 8.75
  36. 1100
  37. 1.75
  38. 10400
  39. 1950
  40. 4800

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