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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 872 · 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.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  6. 6.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 3.8 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  12. 12.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  14. 14.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  15. 15.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  24. 24.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 12 seconds?

Answer key

  1. pauses for half a second
  2. 7
  3. 1200
  4. 1500
  5. 10
  6. 3600
  7. 1050
  8. 3800
  9. 5
  10. 10
  11. 0.25
  12. 8800
  13. 16
  14. 1000
  15. 1400
  16. 1000
  17. 3.75
  18. 1
  19. 1800
  20. 1150
  21. 1600
  22. 11200
  23. 32
  24. 1.75
  25. 800
  26. 4000
  27. 500
  28. 350
  29. 5
  30. 1400
  31. 30
  32. 12
  33. 20
  34. 950
  35. 200
  36. 5.25
  37. 7
  38. 1000
  39. 6.25
  40. 30

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