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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 879 · 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 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  2. 2.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  7. 7.⏱️ How many milliseconds is a wait of 3.5 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  11. 11.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  13. 13.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 3 seconds?
  15. 15.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 2.1 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 3.6 seconds?
  23. 23.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 14 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 3.7 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 2.3 seconds?
  28. 28.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 20 seconds?
  30. 30.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 14 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 5 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 20
  2. 2.5
  3. 7
  4. 10
  5. 12600
  6. 6
  7. 3500
  8. 1700
  9. 1300
  10. 1.75
  11. 8
  12. 1000
  13. 14000
  14. 3
  15. pauses for half a second
  16. 15
  17. 650
  18. 4.75
  19. 2100
  20. 10
  21. 8.25
  22. 3600
  23. 3
  24. 6000
  25. 35
  26. 3700
  27. 2300
  28. 5.25
  29. 10
  30. 2.75
  31. 9.75
  32. 350
  33. 2200
  34. 7
  35. 5000
  36. 28
  37. 1600
  38. 1300
  39. 0.75
  40. 650

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