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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 570 · 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.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  2. 2.⏱️ How many milliseconds is a wait of 3.8 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 0.2 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 2.6 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ 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
  11. 11.⏱️ How many milliseconds is a wait of 4.6 seconds?
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  14. 14.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 0.9 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 2.2 seconds?
  21. 21.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 2.7 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 2 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 0.4 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 0.3 seconds?
  33. 33.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?

Answer key

  1. 1000
  2. 3800
  3. 200
  4. 40
  5. 9600
  6. 2.5
  7. 1100
  8. 2600
  9. 1150
  10. pauses for half a second
  11. 4600
  12. 3600
  13. 35
  14. 5.25
  15. 1050
  16. 900
  17. 16
  18. 4
  19. 1050
  20. 2200
  21. 6.25
  22. 2700
  23. 1
  24. 1000
  25. 2.75
  26. 600
  27. 8.5
  28. 2
  29. 3.5
  30. 2000
  31. 400
  32. 300
  33. 8400
  34. 1
  35. 5.75
  36. 1800
  37. 5.5
  38. 3200
  39. 6.5
  40. 10

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