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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 356 · 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) 1000 (b) 100 (c) 10 (d) 60
  2. 2.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  3. 3.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?
  6. 6.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ 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
  9. 9.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  10. 10.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 3.5 seconds?
  12. 12.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  15. 15.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  21. 21.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 1.4 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 9 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 1 second?
  37. 37.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 0.9 seconds?
  40. 40.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1000
  2. 7.5
  3. 3300
  4. 3200
  5. 14
  6. 7.25
  7. 1150
  8. pauses for half a second
  9. 16
  10. 2600
  11. 3500
  12. 3400
  13. 4
  14. 30
  15. 3300
  16. 5600
  17. 4000
  18. 6.25
  19. 1.5
  20. 10
  21. 5000
  22. 1.75
  23. 1400
  24. 1800
  25. 1200
  26. 9800
  27. 9.25
  28. 1400
  29. 1000
  30. 1
  31. 2
  32. 4500
  33. 18
  34. 1900
  35. 5
  36. 1
  37. 0.75
  38. 14
  39. 900
  40. 3500

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