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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 908 · 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) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 3.1 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 3.4 seconds?
  10. 10.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 1 second?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  25. 25.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 14 seconds?
  30. 30.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 0.5 seconds?
  32. 32.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 5 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 0.4 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 1.1 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ How many milliseconds is a wait of 0.7 seconds?
  40. 40.⏱️ A program says “wait 500 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 25
  3. 3100
  4. 25
  5. 8
  6. 500
  7. 4000
  8. 4
  9. 3400
  10. 3200
  11. 1000
  12. 350
  13. 550
  14. 3.25
  15. 2
  16. 350
  17. 15
  18. 25
  19. 18
  20. 15
  21. 8
  22. 750
  23. 1.75
  24. 16
  25. 900
  26. 900
  27. 700
  28. 650
  29. 7
  30. 6300
  31. 500
  32. 3000
  33. 5
  34. 400
  35. 4
  36. 35
  37. 1100
  38. 500
  39. 700
  40. 0.5

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