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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 888 · 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 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  6. 6.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  9. 9.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  10. 10.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  11. 11.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 0.2 seconds?
  14. 14.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 4.9 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 2.4 seconds?
  18. 18.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  21. 21.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 5 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 3 seconds?
  24. 24.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  26. 26.⏱️ How many milliseconds is a wait of 2.5 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 1.8 seconds?
  34. 34.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  36. 36.⏱️ How many milliseconds is a wait of 2.7 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 4.8 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?

Answer key

  1. 20
  2. 950
  3. 950
  4. 7
  5. 14
  6. 9.75
  7. 1700
  8. 8.75
  9. pauses for half a second
  10. 8
  11. 0.75
  12. 10
  13. 200
  14. 3.25
  15. 1200
  16. 4900
  17. 2400
  18. 2200
  19. 650
  20. 1000
  21. 3.5
  22. 5000
  23. 3000
  24. 4
  25. 9
  26. 2500
  27. 1800
  28. 500
  29. 1300
  30. 6.75
  31. 1400
  32. 600
  33. 1800
  34. 2400
  35. 10
  36. 2700
  37. 4800
  38. 1000
  39. 8000
  40. 15

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