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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 472 · 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 850 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds is a wait of 1.3 seconds?
  4. 4.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  6. 6.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 20 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 14 seconds?
  10. 10.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) blinks 500 times (d) waits 500 seconds
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 2.8 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 1.2 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 4.6 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  27. 27.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 2.9 seconds?
  29. 29.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 4.1 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 8 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 4 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 2 seconds?
  37. 37.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  39. 39.⏱️ How many milliseconds is a wait of 0.7 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1500
  2. 1150
  3. 1300
  4. 11900
  5. 6
  6. 8.75
  7. 11900
  8. 10
  9. 35
  10. 2.75
  11. 1000
  12. 4000
  13. 650
  14. pauses for half a second
  15. 1200
  16. 2800
  17. 2000
  18. 1500
  19. 9000
  20. 1200
  21. 4600
  22. 10
  23. 1250
  24. 10
  25. 9.25
  26. 7
  27. 4.25
  28. 2900
  29. 8.25
  30. 13000
  31. 4100
  32. 8
  33. 4000
  34. 950
  35. 800
  36. 2000
  37. 5.5
  38. 2.25
  39. 700
  40. 1700

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