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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 584 · 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 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 2 seconds?
  4. 4.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  7. 7.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  9. 9.⏱️ How many milliseconds is a wait of 4.1 seconds?
  10. 10.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds is a wait of 0.3 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 0.2 seconds?
  16. 16.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 0.8 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 1.5 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  24. 24.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 1150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 18 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  30. 30.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 0.6 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 3.9 seconds?
  37. 37.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 18 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  40. 40.⏱️ A program says “wait 6750 ms”. How many seconds is that? =

Answer key

  1. 5
  2. 16
  3. 4
  4. 7.75
  5. 1700
  6. pauses for half a second
  7. 1050
  8. 1000
  9. 4100
  10. 5.75
  11. 1850
  12. 300
  13. 1500
  14. 400
  15. 200
  16. 4000
  17. 4
  18. 4000
  19. 1600
  20. 3000
  21. 800
  22. 1500
  23. 50
  24. 6300
  25. 5
  26. 28
  27. 14
  28. 9
  29. 6
  30. 9
  31. 3.5
  32. 8
  33. 600
  34. 200
  35. 24
  36. 3900
  37. 4200
  38. 45
  39. 4
  40. 6.75

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