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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 538 · 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.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  3. 3.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  4. 4.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 0.7 seconds?
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  12. 12.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 1.5 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 16 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ How many milliseconds is a wait of 1.9 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 16 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 3.3 seconds?
  21. 21.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  27. 27.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  28. 28.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 5 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 0.6 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ How many milliseconds is a wait of 1.6 seconds?
  35. 35.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 0.4 seconds?

Answer key

  1. 5.75
  2. 1000
  3. pauses for half a second
  4. 4800
  5. 1.75
  6. 36
  7. 700
  8. 1600
  9. 8400
  10. 1050
  11. 7.25
  12. 1800
  13. 1500
  14. 3
  15. 8
  16. 1200
  17. 1900
  18. 1300
  19. 8
  20. 3300
  21. 4.75
  22. 2800
  23. 600
  24. 10400
  25. 45
  26. 5
  27. 35
  28. 9.5
  29. 5
  30. 600
  31. 450
  32. 600
  33. 750
  34. 1600
  35. 0.25
  36. 550
  37. 2.5
  38. 8
  39. 1500
  40. 400

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