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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 663 · 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 800 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  3. 3.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 4.2 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 0.6 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 1 second?
  12. 12.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  15. 15.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  17. 17.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 3 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 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 6 seconds?
  21. 21.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  23. 23.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 3.3 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 1.4 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  30. 30.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 20 seconds?
  31. 31.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ How many milliseconds is a wait of 3.8 seconds?
  33. 33.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 1.1 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 0.4 seconds?
  38. 38.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?

Answer key

  1. 1100
  2. 1000
  3. 5.5
  4. 3900
  5. 0.25
  6. 1250
  7. 950
  8. 4200
  9. 10
  10. 600
  11. 1
  12. 8800
  13. 5
  14. 25
  15. 9.25
  16. 20
  17. 3
  18. 4
  19. 3300
  20. 6
  21. 9.5
  22. 2
  23. 6.5
  24. 2800
  25. 1400
  26. 3300
  27. 1600
  28. 1400
  29. 5
  30. 10
  31. 5500
  32. 3800
  33. 6000
  34. 1.25
  35. 1750
  36. 1100
  37. 400
  38. pauses for half a second
  39. 16
  40. 36

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