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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 506 · 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.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  3. 3.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 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 9 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  9. 9.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 3.6 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 3.9 seconds?
  15. 15.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  16. 16.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1300 ms }
    How many times does the LED blink in 20 seconds?
  22. 22.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 4.2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 3.8 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 4 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 3000 ms”. How many seconds is that? =

Answer key

  1. 6300
  2. 1000
  3. 1100
  4. 5
  5. 36
  6. 10
  7. 28
  8. 10
  9. 5400
  10. 8100
  11. 750
  12. 2000
  13. 3600
  14. 3900
  15. pauses for half a second
  16. 1100
  17. 5.25
  18. 2
  19. 1.25
  20. 16
  21. 10
  22. 4.5
  23. 9
  24. 650
  25. 250
  26. 2500
  27. 5000
  28. 28
  29. 750
  30. 15
  31. 4200
  32. 6
  33. 1.5
  34. 1350
  35. 650
  36. 3.25
  37. 3800
  38. 4
  39. 1050
  40. 3

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