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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 270 · 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.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 9 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 1.2 seconds?
  4. 4.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 10 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  11. 11.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 3 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 14 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  21. 21.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 1300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 18 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 0.1 seconds?
  24. 24.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  25. 25.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 4.9 seconds?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 1.7 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 1.3 seconds?
  33. 33.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  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.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 7 seconds?

Answer key

  1. pauses for half a second
  2. 9
  3. 1200
  4. 1500
  5. 8500
  6. 8.5
  7. 3600
  8. 5
  9. 6
  10. 1000
  11. 5700
  12. 3000
  13. 950
  14. 7
  15. 1100
  16. 7
  17. 1350
  18. 7.75
  19. 7000
  20. 6
  21. 8
  22. 9
  23. 100
  24. 2.5
  25. 2400
  26. 1.25
  27. 40
  28. 4900
  29. 2500
  30. 11000
  31. 1700
  32. 1300
  33. 6800
  34. 20
  35. 700
  36. 6300
  37. 4.75
  38. 5
  39. 800
  40. 7

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