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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 869 · 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) 1000 (c) 10 (d) 100
  2. 2.⏱️ How many milliseconds is a wait of 1.9 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  6. 6.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  7. 7.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 7 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 2 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 3 seconds?
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 16 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 2.6 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 6 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 0.1 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 3 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 0.8 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  32. 32.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  35. 35.⏱️ How many milliseconds is a wait of 0.2 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.3 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 4.9 seconds?
  38. 38.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 0.3 seconds?
  40. 40.⏱️ A program says “wait 1500 ms”. How many seconds is that? =

Answer key

  1. 1000
  2. 1900
  3. 6
  4. 1500
  5. 18
  6. 4.75
  7. pauses for half a second
  8. 8400
  9. 5600
  10. 7
  11. 1750
  12. 9900
  13. 2000
  14. 3000
  15. 3600
  16. 40
  17. 2600
  18. 3
  19. 100
  20. 850
  21. 400
  22. 1450
  23. 350
  24. 1050
  25. 28
  26. 6
  27. 800
  28. 400
  29. 5.75
  30. 1.25
  31. 35
  32. 2400
  33. 1250
  34. 8.25
  35. 200
  36. 4300
  37. 4900
  38. 6000
  39. 300
  40. 1.5

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