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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 630 · 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 750 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  4. 4.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  5. 5.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 14 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 20 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  8. 8.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  16. 16.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 0.6 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 4.4 seconds?
  20. 20.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 4.7 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 1.6 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 5 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 2.7 seconds?
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ How many milliseconds is a wait of 3 seconds?
  28. 28.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 0.4 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ A program says “wait 2750 ms”. How many seconds is that? =

Answer key

  1. 1150
  2. 3.5
  3. 4.25
  4. pauses for half a second
  5. 7
  6. 10
  7. 20
  8. 8.5
  9. 350
  10. 400
  11. 10000
  12. 2.25
  13. 8
  14. 1400
  15. 1000
  16. 3.25
  17. 200
  18. 600
  19. 4400
  20. 0.5
  21. 4700
  22. 25
  23. 1600
  24. 5000
  25. 2700
  26. 2600
  27. 3000
  28. 6000
  29. 4
  30. 7000
  31. 40
  32. 1050
  33. 4800
  34. 400
  35. 600
  36. 1150
  37. 7.25
  38. 1900
  39. 8
  40. 2.75

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