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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 284 · 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.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 6 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  8. 8.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  12. 12.⏱️ How many milliseconds is a wait of 2.9 seconds?
  13. 13.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 3.2 seconds?
  19. 19.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 1.4 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  23. 23.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 8 seconds?

Answer key

  1. 6
  2. 4
  3. 1000
  4. 2
  5. 2
  6. 550
  7. 35
  8. pauses for half a second
  9. 4900
  10. 850
  11. 4
  12. 2900
  13. 2700
  14. 2200
  15. 1250
  16. 1750
  17. 400
  18. 3200
  19. 5.5
  20. 1400
  21. 10
  22. 1000
  23. 1.75
  24. 1.25
  25. 2.5
  26. 5
  27. 950
  28. 4.75
  29. 1050
  30. 9.5
  31. 20
  32. 1700
  33. 1050
  34. 4.25
  35. 8
  36. 950
  37. 3
  38. 32
  39. 350
  40. 8

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