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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 515 · 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.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  2. 2.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  6. 6.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 2 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 1.5 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 3.9 seconds?
  11. 11.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  12. 12.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 1.9 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  21. 21.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 1.3 seconds?
  23. 23.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ How many milliseconds is a wait of 4.9 seconds?
  25. 25.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 3.4 seconds?
  30. 30.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  40. 40.⏱️ A program says “wait 8250 ms”. How many seconds is that? =

Answer key

  1. 7.75
  2. 5.75
  3. 16
  4. 1000
  5. 40
  6. 2.25
  7. 7.5
  8. 2000
  9. 1500
  10. 3900
  11. pauses for half a second
  12. 6000
  13. 3400
  14. 4
  15. 1900
  16. 36
  17. 8
  18. 950
  19. 13000
  20. 4.5
  21. 9.25
  22. 1300
  23. 7600
  24. 4900
  25. 4.75
  26. 3000
  27. 800
  28. 500
  29. 3400
  30. 8400
  31. 9900
  32. 1050
  33. 1600
  34. 1450
  35. 900
  36. 8
  37. 15
  38. 3600
  39. 6
  40. 8.25

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