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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 252 · 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 500 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 4.9 seconds?
  4. 4.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  5. 5.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  8. 8.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  10. 10.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 1 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 12 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 2.8 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  18. 18.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ How many milliseconds is a wait of 4.5 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 1.3 seconds?
  23. 23.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 0.1 seconds?
  25. 25.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 4.2 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  34. 34.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 4.6 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 5 seconds?
  40. 40.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. 850
  2. 1
  3. 4900
  4. pauses for half a second
  5. 2000
  6. 0.25
  7. 1000
  8. 1100
  9. 3
  10. 6400
  11. 4000
  12. 1000
  13. 6
  14. 750
  15. 2800
  16. 450
  17. 4
  18. 11700
  19. 4500
  20. 18
  21. 8
  22. 1300
  23. 4
  24. 100
  25. 11200
  26. 1500
  27. 4400
  28. 14000
  29. 4200
  30. 1000
  31. 1600
  32. 1.25
  33. 18
  34. 8.75
  35. 1050
  36. 500
  37. 1250
  38. 4600
  39. 5
  40. 15300

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