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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 481 · 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.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  4. 4.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  5. 5.⏱️ How many milliseconds is a wait of 0.2 seconds?
  6. 6.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 0.6 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  12. 12.⏱️ How many milliseconds is a wait of 3.8 seconds?
  13. 13.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 2.7 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 18 seconds?
  19. 19.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  20. 20.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 8 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  27. 27.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  33. 33.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 2.6 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?

Answer key

  1. 9000
  2. 35
  3. 3.75
  4. pauses for half a second
  5. 200
  6. 10
  7. 30
  8. 600
  9. 4
  10. 45
  11. 1000
  12. 3800
  13. 2.5
  14. 3600
  15. 15200
  16. 5
  17. 2700
  18. 45
  19. 4.5
  20. 3.5
  21. 4800
  22. 9.5
  23. 12
  24. 4000
  25. 8
  26. 35
  27. 8000
  28. 1
  29. 28
  30. 1250
  31. 1000
  32. 35
  33. 8.25
  34. 0.75
  35. 5.25
  36. 6000
  37. 1400
  38. 2600
  39. 1600
  40. 8

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