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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 758 · 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) 1000 (b) 100 (c) 10 (d) 60
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  5. 5.⏱️ How many milliseconds is a wait of 3.8 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 1650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ How many milliseconds is a wait of 1.7 seconds?
  18. 18.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 20 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  27. 27.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  29. 29.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 20 seconds?
  32. 32.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 3.9 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 3 seconds?

Answer key

  1. 1000
  2. 20
  3. 1400
  4. pauses for half a second
  5. 3800
  6. 1450
  7. 17000
  8. 4800
  9. 3500
  10. 700
  11. 9.5
  12. 20
  13. 9
  14. 4500
  15. 1400
  16. 900
  17. 1700
  18. 3.75
  19. 900
  20. 1150
  21. 3600
  22. 5
  23. 7.5
  24. 1500
  25. 50
  26. 5
  27. 1750
  28. 6
  29. 1.75
  30. 1400
  31. 50
  32. 7000
  33. 850
  34. 24
  35. 20
  36. 4000
  37. 5
  38. 3900
  39. 20
  40. 3000

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