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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 599 · 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.

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  1. 1.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds is a wait of 1.4 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 3.7 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 20 seconds?
  14. 14.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ How many milliseconds is a wait of 2.5 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 6 seconds?
  21. 21.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 5 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  39. 39.⏱️ How many milliseconds is a wait of 1.9 seconds?
  40. 40.⏱️ A program says “wait 9000 ms”. How many seconds is that? =

Answer key

  1. 3600
  2. pauses for half a second
  3. 750
  4. 1400
  5. 3700
  6. 800
  7. 1400
  8. 1450
  9. 4800
  10. 6600
  11. 1000
  12. 3000
  13. 10
  14. 1000
  15. 4
  16. 1050
  17. 1650
  18. 3000
  19. 2500
  20. 12
  21. 10
  22. 0.5
  23. 5.75
  24. 2.75
  25. 8
  26. 25
  27. 1700
  28. 5000
  29. 1500
  30. 5200
  31. 15000
  32. 12
  33. 3.75
  34. 500
  35. 9.5
  36. 1.75
  37. 2.25
  38. 1
  39. 1900
  40. 9

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