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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 134 · 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 is a wait of 2.4 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 7 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  5. 5.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 14 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ 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
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  13. 13.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  16. 16.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 3.8 seconds?
  20. 20.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  22. 22.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 1.9 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 4 seconds?
  26. 26.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 5 seconds?
  35. 35.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  40. 40.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?

Answer key

  1. 2400
  2. 450
  3. 7
  4. 1000
  5. 35
  6. 1250
  7. 1500
  8. 14000
  9. pauses for half a second
  10. 10
  11. 4.75
  12. 2
  13. 9000
  14. 9
  15. 15
  16. 5400
  17. 650
  18. 800
  19. 3800
  20. 4000
  21. 10
  22. 3600
  23. 3
  24. 1900
  25. 2
  26. 3500
  27. 5500
  28. 8.5
  29. 1.75
  30. 2400
  31. 7.5
  32. 2000
  33. 4.5
  34. 5000
  35. 4
  36. 1200
  37. 1000
  38. 1200
  39. 40
  40. 4800

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