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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 647 · 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.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  2. 2.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  3. 3.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) blinks 500 times (d) waits 500 seconds
  4. 4.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 1.3 seconds?
  9. 9.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 2.7 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 4.4 seconds?
  14. 14.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 3.2 seconds?
  21. 21.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 20 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  30. 30.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 20 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?

Answer key

  1. 1000
  2. 0.5
  3. pauses for half a second
  4. 9000
  5. 8
  6. 1000
  7. 50
  8. 1300
  9. 7
  10. 2700
  11. 1000
  12. 3600
  13. 4400
  14. 2000
  15. 2000
  16. 2400
  17. 1800
  18. 1600
  19. 950
  20. 3200
  21. 1.75
  22. 50
  23. 800
  24. 5
  25. 850
  26. 10400
  27. 1000
  28. 1250
  29. 6
  30. 8000
  31. 1350
  32. 2.75
  33. 0.75
  34. 3
  35. 2.25
  36. 4
  37. 450
  38. 1150
  39. 10
  40. 7

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