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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 352 · 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) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  2. 2.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds is a wait of 3 seconds?
  4. 4.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  6. 6.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 1 seconds?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 100 (d) 60
  10. 10.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 4.7 seconds?
  18. 18.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 1.8 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 0.3 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 0.8 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 4 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  28. 28.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ How many milliseconds is a wait of 1.2 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 5 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 12 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 200 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 3750 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  39. 39.⏱️ How many milliseconds is a wait of 3.9 seconds?
  40. 40.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 1200
  3. 3000
  4. 8
  5. 40
  6. 14400
  7. 1800
  8. 1000
  9. 1000
  10. 750
  11. 1800
  12. 2.75
  13. 1450
  14. 2
  15. 150
  16. 5.5
  17. 4700
  18. 5.75
  19. 1800
  20. 300
  21. 800
  22. 1200
  23. 2
  24. 600
  25. 5500
  26. 10
  27. 2
  28. 6500
  29. 7
  30. 1
  31. 9900
  32. 1200
  33. 5000
  34. 30
  35. 300
  36. 5
  37. 3.75
  38. 2.5
  39. 3900
  40. 10200

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