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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 12 · 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) 10 (b) 60 (c) 100 (d) 1000
  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.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 5 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  7. 7.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ How many milliseconds is a wait of 2.8 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 3.9 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  16. 16.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 3.1 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 2.7 seconds?
  19. 19.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 1 second?
  22. 22.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  27. 27.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  30. 30.⏱️ How many milliseconds is a wait of 4.8 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 4.2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 16 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1000
  2. pauses for half a second
  3. 900
  4. 16
  5. 5
  6. 20
  7. 9600
  8. 1200
  9. 2000
  10. 2800
  11. 28
  12. 3900
  13. 800
  14. 6.5
  15. 5.75
  16. 9
  17. 3100
  18. 2700
  19. 800
  20. 40
  21. 1
  22. 3000
  23. 600
  24. 10
  25. 6.25
  26. 15
  27. 9.75
  28. 40
  29. 2.75
  30. 4800
  31. 4200
  32. 8
  33. 1450
  34. 7200
  35. 7000
  36. 18
  37. 5100
  38. 6500
  39. 10500
  40. 1200

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