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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 439 · 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 150 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  3. 3.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  4. 4.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  8. 8.⏱️ How many milliseconds is a wait of 2.4 seconds?
  9. 9.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 2.7 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 3 seconds?
  12. 12.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 10 seconds?
  14. 14.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4.2 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 3.9 seconds?
  18. 18.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 20 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 18 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 10 seconds?
  32. 32.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 12 seconds?
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1000
  2. 15
  3. pauses for half a second
  4. 1450
  5. 10800
  6. 8
  7. 4
  8. 2400
  9. 4.25
  10. 2700
  11. 3000
  12. 2400
  13. 10
  14. 1000
  15. 8
  16. 4200
  17. 3900
  18. 9000
  19. 9
  20. 4
  21. 3300
  22. 7.5
  23. 50
  24. 45
  25. 35
  26. 150
  27. 24
  28. 15
  29. 1150
  30. 3900
  31. 10
  32. 1.75
  33. 2.75
  34. 800
  35. 30
  36. 3000
  37. 10400
  38. 950
  39. 750
  40. 1400

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