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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 34 · 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.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  2. 2.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  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) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  5. 5.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 4 seconds?
  7. 7.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 3 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 2.8 seconds?
  11. 11.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 2.1 seconds?
  16. 16.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 2.2 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ How many milliseconds is a wait of 0.4 seconds?
  31. 31.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  33. 33.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 14 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?

Answer key

  1. 1000
  2. 1550
  3. 2400
  4. pauses for half a second
  5. 12600
  6. 2
  7. 11700
  8. 15
  9. 3000
  10. 2800
  11. 1500
  12. 1750
  13. 7.25
  14. 300
  15. 2100
  16. 11000
  17. 1700
  18. 7.5
  19. 1050
  20. 8.75
  21. 200
  22. 5400
  23. 800
  24. 600
  25. 7700
  26. 2200
  27. 14
  28. 900
  29. 1550
  30. 400
  31. 9
  32. 16
  33. 0.5
  34. 10
  35. 35
  36. 4
  37. 12
  38. 4500
  39. 400
  40. 28

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