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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 688 · 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.⏱️ 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
  2. 2.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 12 seconds?
  3. 3.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  5. 5.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds is a wait of 4.9 seconds?
  7. 7.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 12 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ How many milliseconds is a wait of 2.8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  23. 23.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 1.7 seconds?
  26. 26.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 0.6 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  30. 30.⏱️ How many milliseconds is a wait of 3.4 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 3.6 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 6
  3. 4800
  4. 1000
  5. 5.75
  6. 4900
  7. 6.75
  8. 6.25
  9. 30
  10. 10
  11. 10400
  12. 1150
  13. 750
  14. 1050
  15. 4400
  16. 100
  17. 2800
  18. 1
  19. 7200
  20. 5.5
  21. 4800
  22. 24
  23. 8.5
  24. 2
  25. 1700
  26. 3
  27. 600
  28. 950
  29. 3.5
  30. 3400
  31. 500
  32. 16
  33. 1200
  34. 1100
  35. 2.75
  36. 8400
  37. 400
  38. 3600
  39. 20
  40. 500

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