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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 68 · 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) turns the LED off (d) pauses for half a second
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  5. 5.⏱️ How many milliseconds is a wait of 2 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ How many milliseconds is a wait of 0.4 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 2.2 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  10. 10.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  17. 17.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 8 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  20. 20.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 4.1 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 3.3 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 3.9 seconds?
  26. 26.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  28. 28.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 1.1 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 1.5 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 2.7 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 4.9 seconds?

Answer key

  1. pauses for half a second
  2. 6400
  3. 3.5
  4. 4
  5. 2000
  6. 900
  7. 400
  8. 2200
  9. 30
  10. 1.75
  11. 14
  12. 1050
  13. 1250
  14. 36
  15. 600
  16. 1000
  17. 0.5
  18. 8
  19. 10
  20. 9.5
  21. 1000
  22. 4100
  23. 850
  24. 3300
  25. 3900
  26. 17000
  27. 15
  28. 1
  29. 1100
  30. 1550
  31. 3000
  32. 2
  33. 1500
  34. 1550
  35. 6.5
  36. 2000
  37. 2.5
  38. 15
  39. 2700
  40. 4900

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