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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 62 · 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.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  3. 3.⏱️ How many milliseconds is a wait of 1.9 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 2.1 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  8. 8.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 9 seconds?
  9. 9.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 2 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 0.3 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 1.1 seconds?
  22. 22.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 4750 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 5 seconds?
  27. 27.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 4.8 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 4 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 14 seconds?
  32. 32.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 4.7 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 16 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?

Answer key

  1. 1600
  2. pauses for half a second
  3. 1900
  4. 10
  5. 2100
  6. 16
  7. 1000
  8. 9
  9. 2.25
  10. 550
  11. 600
  12. 2
  13. 300
  14. 1
  15. 2.75
  16. 800
  17. 750
  18. 1350
  19. 3600
  20. 350
  21. 1100
  22. 5.75
  23. 10
  24. 850
  25. 4.75
  26. 25
  27. 9800
  28. 30
  29. 4800
  30. 4000
  31. 7
  32. 9.5
  33. 2800
  34. 700
  35. 850
  36. 50
  37. 4700
  38. 15
  39. 40
  40. 15

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