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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 604 · 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.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 20 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  4. 4.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 0.1 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 14 seconds?
  10. 10.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 3.6 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ 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
  14. 14.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  15. 15.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  25. 25.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  26. 26.⏱️ How many milliseconds is a wait of 0.6 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  28. 28.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 1.8 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 18 seconds?
  31. 31.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  35. 35.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?

Answer key

  1. 50
  2. 10
  3. 1000
  4. 600
  5. 2700
  6. 6000
  7. 6
  8. 100
  9. 7
  10. 6.5
  11. 3600
  12. 1250
  13. pauses for half a second
  14. 12
  15. 2500
  16. 5.75
  17. 0.25
  18. 6.25
  19. 4
  20. 20
  21. 3200
  22. 3.5
  23. 7500
  24. 30
  25. 2.25
  26. 600
  27. 45
  28. 7200
  29. 1800
  30. 45
  31. 7.25
  32. 400
  33. 3900
  34. 40
  35. 1600
  36. 950
  37. 10
  38. 700
  39. 3500
  40. 11200

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