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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 924 · 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 are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  4. 4.⏱️ How many milliseconds is a wait of 0.4 seconds?
  5. 5.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 1 second?
  7. 7.⏱️ How many milliseconds is a wait of 5 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 2.4 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 16 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 4.2 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 2 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 1.3 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 2.1 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  28. 28.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 5 seconds?
  31. 31.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 16 seconds?
  37. 37.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 2.8 seconds?

Answer key

  1. 1000
  2. 20
  3. pauses for half a second
  4. 400
  5. 2.5
  6. 1
  7. 5000
  8. 2400
  9. 4
  10. 8
  11. 4200
  12. 10
  13. 2000
  14. 1250
  15. 9.75
  16. 700
  17. 3600
  18. 1050
  19. 3600
  20. 1300
  21. 10
  22. 0.25
  23. 12600
  24. 5
  25. 7200
  26. 2100
  27. 6
  28. 1.75
  29. 2700
  30. 5
  31. 1.5
  32. 0.75
  33. 3
  34. 3600
  35. 1000
  36. 8
  37. 9.5
  38. 6000
  39. 6
  40. 2800

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