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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 154 · 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.⏱️ How many milliseconds is a wait of 0.5 seconds?
  2. 2.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 1150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  6. 6.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 5 seconds?
  17. 17.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 4.9 seconds?
  21. 21.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  22. 22.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 1.5 seconds?
  30. 30.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  37. 37.⏱️ How many milliseconds is a wait of 3.9 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. 500
  2. 1.25
  3. 2.75
  4. 5
  5. pauses for half a second
  6. 950
  7. 7500
  8. 4200
  9. 450
  10. 11700
  11. 2
  12. 1000
  13. 1700
  14. 5
  15. 20000
  16. 5000
  17. 9.75
  18. 6600
  19. 800
  20. 4900
  21. 1000
  22. 800
  23. 900
  24. 5600
  25. 14000
  26. 300
  27. 2.5
  28. 900
  29. 1500
  30. 5
  31. 13000
  32. 7000
  33. 4
  34. 800
  35. 1000
  36. 5
  37. 3900
  38. 1200
  39. 9900
  40. 2200

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