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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 814 · 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 1 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.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ How many milliseconds is a wait of 1.1 seconds?
  8. 8.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  10. 10.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 1.4 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 8 seconds?
  13. 13.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 5 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 3.5 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 2.5 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  22. 22.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 1.9 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ How many milliseconds is a wait of 2.9 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  31. 31.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 2750 ms”. How many seconds is that? =

Answer key

  1. 1000
  2. pauses for half a second
  3. 1150
  4. 600
  5. 4.5
  6. 300
  7. 1100
  8. 8000
  9. 1000
  10. 7.5
  11. 1400
  12. 20
  13. 10000
  14. 3.75
  15. 5000
  16. 15
  17. 1100
  18. 40
  19. 3500
  20. 2500
  21. 36
  22. 1.75
  23. 1900
  24. 1950
  25. 1600
  26. 2100
  27. 2900
  28. 1250
  29. 4000
  30. 20
  31. 3200
  32. 550
  33. 11900
  34. 4.25
  35. 0.25
  36. 9
  37. 1400
  38. 12
  39. 9.75
  40. 2.75

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