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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 780 · 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 250 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  3. 3.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  5. 5.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 2.8 seconds?
  7. 7.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  10. 10.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  12. 12.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1300 ms }
    How many times does the LED blink in 4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 20 seconds?
  20. 20.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 0.4 seconds?
  24. 24.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 1300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 2 seconds?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  31. 31.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 1.5 seconds?
  34. 34.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  37. 37.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 6250 ms”. How many seconds is that? =

Answer key

  1. 0.25
  2. 1000
  3. 2400
  4. pauses for half a second
  5. 550
  6. 2800
  7. 2400
  8. 1200
  9. 10
  10. 7000
  11. 5
  12. 1.5
  13. 500
  14. 5600
  15. 8400
  16. 8
  17. 4.5
  18. 2
  19. 10
  20. 6.5
  21. 1600
  22. 7200
  23. 400
  24. 9600
  25. 400
  26. 5.75
  27. 1000
  28. 1
  29. 7000
  30. 15
  31. 1.25
  32. 2400
  33. 1500
  34. 8000
  35. 4
  36. 9.5
  37. 12600
  38. 9600
  39. 10800
  40. 6.25

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