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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 380 · 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.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ 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
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  4. 4.⏱️ How many milliseconds is a wait of 0.6 seconds?
  5. 5.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  7. 7.⏱️ How many milliseconds is a wait of 4.4 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  10. 10.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  12. 12.⏱️ How many milliseconds is a wait of 4.7 seconds?
  13. 13.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  21. 21.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 12 seconds?
  24. 24.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  26. 26.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  27. 27.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 1.9 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 0.2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 3750 ms”. How many seconds is that? =

Answer key

  1. 17000
  2. pauses for half a second
  3. 1000
  4. 600
  5. 3000
  6. 9
  7. 4400
  8. 250
  9. 2
  10. 8400
  11. 0.75
  12. 4700
  13. 2000
  14. 5.5
  15. 700
  16. 7200
  17. 3600
  18. 1150
  19. 1150
  20. 40
  21. 4.5
  22. 1400
  23. 30
  24. 15300
  25. 20
  26. 5.75
  27. 2.5
  28. 6.75
  29. 4500
  30. 1900
  31. 200
  32. 1350
  33. 1
  34. 1000
  35. 0.5
  36. 20
  37. 3600
  38. 1.25
  39. 300
  40. 3.75

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