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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 527 · 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) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  2. 2.⏱️ How many milliseconds is a wait of 1.1 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  4. 4.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  5. 5.⏱️ How many milliseconds is a wait of 0.4 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 2.5 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 4.9 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 3.5 seconds?
  18. 18.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 0.5 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 3.6 seconds?
  31. 31.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 3.3 seconds?
  33. 33.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 1.2 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  39. 39.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 6000 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 1100
  3. 1000
  4. 2.5
  5. 400
  6. 700
  7. 550
  8. 6.5
  9. 2500
  10. 4900
  11. 16
  12. 5200
  13. 7.75
  14. 6.25
  15. 6400
  16. 9
  17. 3500
  18. 5
  19. 14000
  20. 20
  21. 900
  22. 4400
  23. 1800
  24. 3.25
  25. 10
  26. 500
  27. 1300
  28. 20
  29. 18
  30. 3600
  31. 0.75
  32. 3300
  33. 6000
  34. 1200
  35. 200
  36. 0.5
  37. 12
  38. 45
  39. 2.25
  40. 6

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