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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 611 · 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 400 ms }
    How many times does the LED blink in 3 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 14 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 8 seconds?
  5. 5.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 1.1 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  11. 11.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 0.8 seconds?
  14. 14.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ How many milliseconds is a wait of 4.9 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 0.3 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 4.4 seconds?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 6 seconds?
  22. 22.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 14 seconds?
  26. 26.⏱️ 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
  27. 27.⏱️ How many milliseconds is a wait of 0.2 seconds?
  28. 28.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  31. 31.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 20 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 1.3 seconds?
  37. 37.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 0.4 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?

Answer key

  1. 6
  2. 10
  3. 7
  4. 4
  5. 8400
  6. 4000
  7. 7.75
  8. 1100
  9. 20
  10. 1000
  11. 9
  12. 1850
  13. 800
  14. 5400
  15. 4900
  16. 300
  17. 2500
  18. 0.75
  19. 4400
  20. 3000
  21. 3
  22. 13000
  23. 2400
  24. 2700
  25. 35
  26. pauses for half a second
  27. 200
  28. 3.5
  29. 18
  30. 5
  31. 4
  32. 7.5
  33. 12600
  34. 2.75
  35. 10
  36. 1300
  37. 6.5
  38. 2000
  39. 400
  40. 30

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