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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 956 · 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 9500 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  3. 3.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds is a wait of 0.8 seconds?
  5. 5.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  6. 6.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 10 (d) 60
  9. 9.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  10. 10.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 20 seconds?
  16. 16.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  18. 18.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  19. 19.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 1.6 seconds?
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 3.8 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 10 seconds?
  25. 25.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 1.3 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  38. 38.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  39. 39.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?

Answer key

  1. 9.5
  2. 35
  3. 5400
  4. 800
  5. 7.25
  6. 4.25
  7. 9900
  8. 1000
  9. 8.25
  10. 3.5
  11. 500
  12. 5
  13. 1000
  14. 8
  15. 10
  16. 5.75
  17. 2.5
  18. pauses for half a second
  19. 10800
  20. 18
  21. 1600
  22. 3300
  23. 3800
  24. 10
  25. 4500
  26. 8
  27. 1550
  28. 1050
  29. 11900
  30. 1300
  31. 1200
  32. 8.5
  33. 500
  34. 950
  35. 350
  36. 5.25
  37. 40
  38. 0.5
  39. 4800
  40. 4800

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