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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 487 · 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 900 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  5. 5.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 4.5 seconds?
  7. 7.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds is a wait of 3.6 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  10. 10.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 1.3 seconds?
  12. 12.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  13. 13.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 0.4 seconds?
  18. 18.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 0.3 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 2 seconds?
  24. 24.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 10 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 4.7 seconds?
  27. 27.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 1.8 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  31. 31.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  33. 33.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 1 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 2.4 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 3.2 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1450 ms }
    How many times does the LED blink in 16 seconds?
  40. 40.⏱️ A program says “wait 6000 ms”. How many seconds is that? =

Answer key

  1. 1850
  2. 0.75
  3. 3.75
  4. 1000
  5. 900
  6. 4500
  7. 3000
  8. 3600
  9. 25
  10. 7500
  11. 1300
  12. pauses for half a second
  13. 3.25
  14. 4.5
  15. 750
  16. 5
  17. 400
  18. 1.5
  19. 6400
  20. 3900
  21. 300
  22. 450
  23. 1
  24. 2400
  25. 10
  26. 4700
  27. 8
  28. 1450
  29. 1800
  30. 8
  31. 9.25
  32. 2
  33. 1400
  34. 800
  35. 1000
  36. 2400
  37. 1650
  38. 3200
  39. 8
  40. 6

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