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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 542 · 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 is a wait of 3.9 seconds?
  2. 2.⏱️ 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
  3. 3.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  10. 10.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  12. 12.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  17. 17.⏱️ How many milliseconds is a wait of 1.1 seconds?
  18. 18.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 2.6 seconds?
  20. 20.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 2.7 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 4.1 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 3 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ How many milliseconds is a wait of 3.5 seconds?
  33. 33.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 0.9 seconds?
  38. 38.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?

Answer key

  1. 3900
  2. pauses for half a second
  3. 1050
  4. 1200
  5. 700
  6. 4
  7. 1400
  8. 950
  9. 14
  10. 7000
  11. 7
  12. 5.5
  13. 7000
  14. 7.5
  15. 4.5
  16. 1000
  17. 1100
  18. 2.25
  19. 2600
  20. 5000
  21. 35
  22. 2700
  23. 4100
  24. 3000
  25. 1050
  26. 1350
  27. 14
  28. 3000
  29. 1100
  30. 3
  31. 5400
  32. 3500
  33. 600
  34. 1
  35. 600
  36. 1050
  37. 900
  38. 0.75
  39. 600
  40. 7800

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