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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 596 · 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 is a wait of 4.3 seconds?
  2. 2.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  3. 3.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  5. 5.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  8. 8.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 3.8 seconds?
  10. 10.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 9 seconds?
  12. 12.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 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 1 second?
  15. 15.⏱️ How many milliseconds is a wait of 4.5 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 3.6 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 18 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 4.4 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 16 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 18 seconds?
  36. 36.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  40. 40.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?

Answer key

  1. 4300
  2. pauses for half a second
  3. 4800
  4. 1000
  5. 3600
  6. 2.25
  7. 4
  8. 450
  9. 3800
  10. 3.25
  11. 9
  12. 12000
  13. 400
  14. 4
  15. 4500
  16. 20
  17. 20
  18. 3600
  19. 800
  20. 2400
  21. 0.25
  22. 0.5
  23. 1600
  24. 3
  25. 850
  26. 750
  27. 40
  28. 1250
  29. 4.25
  30. 20
  31. 9
  32. 4400
  33. 8
  34. 750
  35. 9
  36. 11700
  37. 10
  38. 18
  39. 35
  40. 9900

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