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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 939 · 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 150 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 4.5 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  7. 7.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 7 seconds?
  8. 8.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds is a wait of 2.7 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ 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
  14. 14.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  16. 16.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 10 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 18 seconds?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 2 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  34. 34.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 6 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 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 8000 ms”. How many seconds is that? =

Answer key

  1. 16
  2. 1000
  3. 40
  4. 4500
  5. 1100
  6. 4
  7. 7
  8. 3000
  9. 2700
  10. 1150
  11. 3600
  12. 900
  13. pauses for half a second
  14. 8.5
  15. 1.75
  16. 1800
  17. 5.25
  18. 10
  19. 45
  20. 3300
  21. 0.5
  22. 8400
  23. 1850
  24. 4200
  25. 8.25
  26. 400
  27. 3.75
  28. 5400
  29. 2000
  30. 3
  31. 15
  32. 9
  33. 5.5
  34. 2200
  35. 3000
  36. 20
  37. 5600
  38. 1400
  39. 1250
  40. 8

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