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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 650 · 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 4250 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 60 (d) 100
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 12 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 4.6 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  7. 7.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 4.2 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 6 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 2 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 0.6 seconds?
  21. 21.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 1.6 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 2.5 seconds?
  26. 26.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  30. 30.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  31. 31.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 20 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?

Answer key

  1. 4.25
  2. 40
  3. 1000
  4. 30
  5. 4600
  6. 25
  7. 8000
  8. 4800
  9. 5
  10. 25
  11. 45
  12. 4200
  13. 1100
  14. 3
  15. 2000
  16. 750
  17. 950
  18. 1200
  19. 6600
  20. 600
  21. 3500
  22. 5.25
  23. 1600
  24. 700
  25. 2500
  26. 4.5
  27. 10
  28. 8
  29. 4
  30. pauses for half a second
  31. 500
  32. 6600
  33. 6
  34. 900
  35. 6400
  36. 10
  37. 1250
  38. 3800
  39. 1050
  40. 12

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