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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 212 · 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.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  4. 4.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  6. 6.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 1.3 seconds?
  10. 10.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  12. 12.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 1 second?
  16. 16.⏱️ How many milliseconds is a wait of 0.9 seconds?
  17. 17.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ How many milliseconds is a wait of 0.2 seconds?
  20. 20.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  27. 27.⏱️ How many milliseconds is a wait of 1.8 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 3.9 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 2.6 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 0.8 seconds?
  32. 32.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  36. 36.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 18 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  40. 40.⏱️ A program says “wait 750 ms”. How many seconds is that? =

Answer key

  1. 13500
  2. pauses for half a second
  3. 1000
  4. 700
  5. 5.25
  6. 4800
  7. 8.5
  8. 1700
  9. 1300
  10. 3300
  11. 1.25
  12. 5000
  13. 25
  14. 3000
  15. 1
  16. 900
  17. 2.25
  18. 5400
  19. 200
  20. 2
  21. 5100
  22. 15000
  23. 2.5
  24. 1300
  25. 2.75
  26. 1
  27. 1800
  28. 3900
  29. 50
  30. 2600
  31. 800
  32. 1600
  33. 1000
  34. 500
  35. 25
  36. 9
  37. 45
  38. 45
  39. 12
  40. 0.75

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