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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 153 · 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 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  4. 4.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 0.5 seconds?
  15. 15.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  16. 16.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 0.9 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 3.3 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 18 seconds?
  30. 30.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  31. 31.⏱️ How many milliseconds is a wait of 3.5 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 4.5 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 9 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 5000 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 1050
  3. 10
  4. 3900
  5. 0.75
  6. 30
  7. 650
  8. 6300
  9. 5.75
  10. 1000
  11. 40
  12. 2.5
  13. 10800
  14. 500
  15. 1
  16. 11200
  17. 8.75
  18. 1.5
  19. 10
  20. 8
  21. 1050
  22. 4200
  23. 4000
  24. 1
  25. 900
  26. 500
  27. 6.25
  28. 3300
  29. 45
  30. 0.5
  31. 3500
  32. 4500
  33. 1450
  34. 6300
  35. 2000
  36. 18
  37. 1400
  38. 4500
  39. 1000
  40. 5

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