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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 454 · 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 2.2 seconds?
  2. 2.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) blinks 500 times (d) pauses for half a second
  3. 3.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  6. 6.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 60 (d) 100
  8. 8.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 18 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  12. 12.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 3.1 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 3.8 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 0.4 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  19. 19.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  25. 25.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 4.4 seconds?
  36. 36.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 16 seconds?
  39. 39.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 2200
  2. pauses for half a second
  3. 4000
  4. 5600
  5. 36
  6. 5.75
  7. 1000
  8. 6600
  9. 9
  10. 9
  11. 35
  12. 6
  13. 3100
  14. 3800
  15. 400
  16. 20
  17. 6.5
  18. 3
  19. 4500
  20. 550
  21. 1850
  22. 1.25
  23. 5000
  24. 30
  25. 12800
  26. 1150
  27. 10500
  28. 8.75
  29. 6.75
  30. 3400
  31. 1750
  32. 0.5
  33. 10400
  34. 450
  35. 4400
  36. 7.5
  37. 7.25
  38. 8
  39. 2200
  40. 1400

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