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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 468 · 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) pauses for half a second (b) waits 500 seconds (c) turns the LED off (d) blinks 500 times
  2. 2.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  5. 5.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds is a wait of 1 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 8 seconds?
  8. 8.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 0.7 seconds?
  12. 12.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 3.3 seconds?
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 4.2 seconds?
  17. 17.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 3.5 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 4.9 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 0.3 seconds?
  25. 25.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 8 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  31. 31.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  34. 34.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 4 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 4000 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 850
  3. 1200
  4. 1000
  5. 9.75
  6. 1000
  7. 8
  8. 6
  9. 1350
  10. 10
  11. 700
  12. 4500
  13. 3.25
  14. 3300
  15. 9000
  16. 4200
  17. 10
  18. 6300
  19. 1.25
  20. 3500
  21. 4900
  22. 4
  23. 1750
  24. 300
  25. 8400
  26. 9.5
  27. 3200
  28. 20
  29. 4
  30. 4
  31. 1250
  32. 5400
  33. 28
  34. 8.5
  35. 550
  36. 25
  37. 4000
  38. 6
  39. 1800
  40. 4

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