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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 112 · 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.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  2. 2.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 10 (d) 60
  4. 4.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  6. 6.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 0.3 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 3 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1300 ms }
    How many times does the LED blink in 12 seconds?
  14. 14.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  20. 20.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 4.3 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 8 seconds?
  32. 32.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1200 ms }
    How many times does the LED blink in 2 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 2.9 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 1.2 seconds?
  37. 37.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 1.9 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3.1 seconds?
  40. 40.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. 9.25
  2. 1
  3. 1000
  4. 7200
  5. 50
  6. pauses for half a second
  7. 45
  8. 1100
  9. 300
  10. 3000
  11. 10
  12. 300
  13. 6
  14. 6600
  15. 3000
  16. 20
  17. 15300
  18. 4
  19. 16
  20. 3200
  21. 5600
  22. 6400
  23. 2000
  24. 3000
  25. 3.5
  26. 10
  27. 800
  28. 1100
  29. 4300
  30. 800
  31. 8
  32. 6300
  33. 4400
  34. 1
  35. 2900
  36. 1200
  37. 2000
  38. 1900
  39. 3100
  40. 1800

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