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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 705 · 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) 100 (b) 10 (c) 1000 (d) 60
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) waits 500 seconds (d) blinks 500 times
  8. 8.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 3.8 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 0.3 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 20 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  14. 14.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  16. 16.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  21. 21.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 1.2 seconds?
  25. 25.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 20 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 2.6 seconds?
  33. 33.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  40. 40.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1000
  2. 20
  3. 3
  4. 1150
  5. 6000
  6. 1300
  7. pauses for half a second
  8. 950
  9. 3800
  10. 300
  11. 850
  12. 50
  13. 4
  14. 2.5
  15. 15
  16. 1200
  17. 6.25
  18. 12600
  19. 1250
  20. 1.25
  21. 5.75
  22. 3300
  23. 1750
  24. 1200
  25. 1800
  26. 1400
  27. 1100
  28. 3300
  29. 9600
  30. 20
  31. 50
  32. 2600
  33. 8.5
  34. 1
  35. 700
  36. 20
  37. 4800
  38. 650
  39. 20
  40. 3000

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