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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 849 · 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 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 18 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  3. 3.⏱️ How many milliseconds is a wait of 1.5 seconds?
  4. 4.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds is a wait of 1.3 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 4.4 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ How many milliseconds is a wait of 0.2 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 4.1 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 4 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  25. 25.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  27. 27.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  29. 29.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 9
  2. 1000
  3. 1500
  4. 7200
  5. 4000
  6. 1.5
  7. 1200
  8. 3.25
  9. 7.75
  10. 10
  11. 750
  12. 1300
  13. 4400
  14. 1450
  15. 7.5
  16. 850
  17. 200
  18. 1250
  19. 4100
  20. 4000
  21. 1100
  22. 1250
  23. 1350
  24. pauses for half a second
  25. 5.75
  26. 40
  27. 1800
  28. 3
  29. 6.75
  30. 10
  31. 12
  32. 15
  33. 3
  34. 1150
  35. 1300
  36. 5
  37. 2.5
  38. 0.75
  39. 1400
  40. 350

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