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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 190 · 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) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  3. 3.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 4 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 4.7 seconds?
  9. 9.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds is a wait of 3.1 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 2.5 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 1 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 8 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  25. 25.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 3.9 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 0.1 seconds?
  29. 29.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 4.5 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 1.9 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 8 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 1000
  3. 7.75
  4. 0.25
  5. 2
  6. 6
  7. 9
  8. 4700
  9. 4.25
  10. 450
  11. 3100
  12. 400
  13. 2500
  14. 150
  15. 45
  16. 5
  17. 40
  18. 12
  19. 30
  20. 1450
  21. 850
  22. 1000
  23. 4
  24. 6
  25. 7500
  26. 3900
  27. 3
  28. 100
  29. 2.5
  30. 6.75
  31. 9.25
  32. 400
  33. 10000
  34. 4500
  35. 1900
  36. 1950
  37. 0.75
  38. 16
  39. 2
  40. 750

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