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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 822 · 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) 60 (b) 10 (c) 100 (d) 1000
  2. 2.⏱️ 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
  3. 3.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  6. 6.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 0.8 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 2 seconds?
  10. 10.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 9 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 2 seconds?
  14. 14.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds is a wait of 3.9 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  22. 22.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 1.3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 12 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 3.6 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 3.1 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 1.7 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 1100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 1050 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 12 seconds?
  38. 38.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1000
  2. pauses for half a second
  3. 0.25
  4. 8.75
  5. 40
  6. 0.75
  7. 2.75
  8. 800
  9. 2
  10. 2.5
  11. 20
  12. 9
  13. 2000
  14. 3.5
  15. 6.5
  16. 3900
  17. 850
  18. 6.75
  19. 4000
  20. 7
  21. 15
  22. 1
  23. 1300
  24. 6
  25. 3600
  26. 10
  27. 9000
  28. 7.25
  29. 50
  30. 1300
  31. 3100
  32. 1700
  33. 15
  34. 3
  35. 900
  36. 500
  37. 6
  38. 3.75
  39. 2
  40. 8400

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