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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 712 · 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.⏱️ 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
  2. 2.⏱️ How many milliseconds is a wait of 3.1 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds is a wait of 0.8 seconds?
  5. 5.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  6. 6.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  7. 7.⏱️ How many milliseconds is a wait of 4.8 seconds?
  8. 8.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 2.7 seconds?
  11. 11.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  12. 12.⏱️ How many milliseconds is a wait of 4.1 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 1.7 seconds?
  14. 14.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 0.3 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 12 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  24. 24.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  25. 25.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 3 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 4 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  31. 31.⏱️ How many milliseconds is a wait of 1.4 seconds?
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 4.9 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 4.2 seconds?
  36. 36.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  37. 37.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  40. 40.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 3100
  3. 800
  4. 800
  5. 2
  6. 5.75
  7. 4800
  8. 1.75
  9. 7.5
  10. 2700
  11. 4
  12. 4100
  13. 1700
  14. 7
  15. 36
  16. 300
  17. 3
  18. 1750
  19. 30
  20. 850
  21. 1400
  22. 1
  23. 1000
  24. 5
  25. 18000
  26. 3
  27. 2
  28. 40
  29. 2.75
  30. 8.5
  31. 1400
  32. 4800
  33. 7000
  34. 4900
  35. 4200
  36. 9
  37. 3600
  38. 7000
  39. 14
  40. 1200

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