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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 961 · 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 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  6. 6.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) turns the LED off (d) blinks 500 times
  7. 7.⏱️ How many milliseconds is a wait of 2.2 seconds?
  8. 8.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  10. 10.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  14. 14.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 3.7 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  17. 17.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 1.6 seconds?
  19. 19.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 0.8 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 2.6 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  26. 26.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 14 seconds?
  28. 28.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 0.6 seconds?
  34. 34.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  35. 35.⏱️ How many milliseconds is a wait of 3.8 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 0.7 seconds?
  37. 37.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 3.5 seconds?

Answer key

  1. 2
  2. 28
  3. 1
  4. 12000
  5. 3
  6. pauses for half a second
  7. 2200
  8. 6.75
  9. 1.25
  10. 6
  11. 11200
  12. 7.25
  13. 1000
  14. 7.75
  15. 3700
  16. 4
  17. 8.25
  18. 1600
  19. 5.75
  20. 9600
  21. 5000
  22. 2700
  23. 800
  24. 2600
  25. 35
  26. 2400
  27. 35
  28. 4.75
  29. 600
  30. 1250
  31. 9.75
  32. 1000
  33. 600
  34. 3.75
  35. 3800
  36. 700
  37. 4000
  38. 1800
  39. 950
  40. 3500

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