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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 185 · 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.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) blinks 500 times (d) waits 500 seconds
  2. 2.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 12 seconds?
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  7. 7.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 4.4 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 4.7 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 1.7 seconds?
  12. 12.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  21. 21.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 1.5 seconds?
  25. 25.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 8 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  29. 29.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  34. 34.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  36. 36.⏱️ How many milliseconds is a wait of 0.9 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 3.2 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 1650
  3. 20
  4. 50
  5. 6
  6. 1000
  7. 1300
  8. 8.5
  9. 4400
  10. 4700
  11. 1700
  12. 0.5
  13. 4000
  14. 1.75
  15. 2400
  16. 750
  17. 7.75
  18. 350
  19. 1600
  20. 8.25
  21. 5
  22. 4000
  23. 35
  24. 1500
  25. 10500
  26. 8
  27. 850
  28. 28
  29. 7000
  30. 5200
  31. 4
  32. 5400
  33. 32
  34. 0.25
  35. 5.25
  36. 900
  37. 3200
  38. 1250
  39. 9900
  40. 250

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