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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 685 · 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.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  5. 5.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  7. 7.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 0.7 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 20 seconds?
  10. 10.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 3.2 seconds?
  16. 16.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 9 seconds?
  21. 21.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  23. 23.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 2.6 seconds?
  29. 29.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 2.2 seconds?
  31. 31.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  36. 36.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 5 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  40. 40.⏱️ How many milliseconds is a wait of 1.8 seconds?

Answer key

  1. 1000
  2. 0.25
  3. 1300
  4. 2
  5. 1450
  6. pauses for half a second
  7. 1450
  8. 700
  9. 50
  10. 4
  11. 4800
  12. 12000
  13. 5
  14. 900
  15. 3200
  16. 4.75
  17. 3600
  18. 10
  19. 5500
  20. 9
  21. 8
  22. 14
  23. 8400
  24. 3900
  25. 10
  26. 950
  27. 5.25
  28. 2600
  29. 5600
  30. 2200
  31. 1.5
  32. 1500
  33. 2.25
  34. 800
  35. 4
  36. 7.75
  37. 10
  38. 15
  39. 4
  40. 1800

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