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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 657 · 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.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  3. 3.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 18 seconds?
  6. 6.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  12. 12.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 2.9 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 4 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 1 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 14 seconds?
  22. 22.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 0.2 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 1.4 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 1650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  35. 35.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 2 seconds?

Answer key

  1. 4
  2. 1000
  3. 4500
  4. 3200
  5. 9
  6. 1200
  7. 7
  8. 3
  9. 10
  10. 450
  11. pauses for half a second
  12. 1
  13. 2900
  14. 1700
  15. 10500
  16. 7.25
  17. 2
  18. 1800
  19. 11200
  20. 1000
  21. 7
  22. 5000
  23. 8
  24. 1200
  25. 3.75
  26. 950
  27. 550
  28. 200
  29. 1400
  30. 10
  31. 1400
  32. 2800
  33. 12
  34. 8
  35. 4.5
  36. 200
  37. 800
  38. 1100
  39. 1.75
  40. 1

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