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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 456 · 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 1000 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  3. 3.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  4. 4.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  8. 8.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 1 second?
  12. 12.⏱️ How many milliseconds is a wait of 2 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 12 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 1.9 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4 seconds?
  17. 17.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 0.5 seconds?
  19. 19.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ How many milliseconds is a wait of 1.2 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 4.1 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 5 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 4.2 seconds?
  28. 28.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 4 seconds?
  33. 33.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  37. 37.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1050
  2. 1000
  3. pauses for half a second
  4. 4800
  5. 1150
  6. 6400
  7. 28
  8. 3
  9. 1150
  10. 3300
  11. 1
  12. 2000
  13. 30
  14. 1350
  15. 1900
  16. 4000
  17. 1.75
  18. 500
  19. 4000
  20. 3.5
  21. 6300
  22. 1350
  23. 9900
  24. 1200
  25. 4100
  26. 5000
  27. 4200
  28. 4.75
  29. 45
  30. 7500
  31. 1550
  32. 2
  33. 2
  34. 750
  35. 1500
  36. 2
  37. 15000
  38. 4.25
  39. 900
  40. 700

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