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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 532 · 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 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 20 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  7. 7.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  13. 13.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  16. 16.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 2.2 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ 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
  22. 22.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  23. 23.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 1.9 seconds?
  32. 32.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  37. 37.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 1.6 seconds?

Answer key

  1. 10
  2. 25
  3. 2.5
  4. 1250
  5. 11000
  6. 1000
  7. 1500
  8. 1.25
  9. 3
  10. 9000
  11. 850
  12. 30
  13. 5600
  14. 800
  15. 10
  16. 6
  17. 2200
  18. 1800
  19. 550
  20. 8800
  21. pauses for half a second
  22. 4
  23. 4800
  24. 7
  25. 40
  26. 350
  27. 1250
  28. 12000
  29. 2.25
  30. 1150
  31. 1900
  32. 3.5
  33. 13500
  34. 550
  35. 5.75
  36. 5
  37. 4.75
  38. 5
  39. 3900
  40. 1600

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