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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 137 · 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.

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  1. 1.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  3. 3.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 2.4 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 1.7 seconds?
  16. 16.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 2.8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 0.5 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  31. 31.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 450 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.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  35. 35.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 16 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 12
  3. 9000
  4. 500
  5. 1000
  6. 10
  7. 3.25
  8. 2400
  9. 350
  10. 50
  11. 2800
  12. 1250
  13. 9.5
  14. 150
  15. 1700
  16. 6600
  17. 2800
  18. 800
  19. 11200
  20. 14
  21. 500
  22. 600
  23. 8800
  24. 800
  25. 7.75
  26. 7.25
  27. 40
  28. 0.75
  29. 6000
  30. 5
  31. 1250
  32. 8.5
  33. 3.5
  34. 40
  35. 9000
  36. 6000
  37. 9.75
  38. 8
  39. 1300
  40. 6000

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