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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 886 · 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 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  2. 2.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds is a wait of 4.5 seconds?
  5. 5.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  6. 6.⏱️ How many milliseconds is a wait of 2.5 seconds?
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 0.2 seconds?
  10. 10.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  13. 13.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 3.6 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 14 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 4.7 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 1.4 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 0.7 seconds?
  26. 26.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 1.1 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 0.4 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?

Answer key

  1. 35
  2. 3.5
  3. 0.75
  4. 4500
  5. pauses for half a second
  6. 2500
  7. 1000
  8. 950
  9. 200
  10. 3
  11. 850
  12. 30
  13. 5400
  14. 3600
  15. 800
  16. 7000
  17. 35
  18. 1000
  19. 4800
  20. 4700
  21. 1
  22. 32
  23. 1400
  24. 18
  25. 700
  26. 7200
  27. 900
  28. 6400
  29. 1050
  30. 2.75
  31. 0.5
  32. 8.75
  33. 1100
  34. 16
  35. 400
  36. 1300
  37. 16
  38. 4.25
  39. 35
  40. 10

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