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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 150 · 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 is a wait of 4.2 seconds?
  2. 2.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 16 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 1400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 16 seconds?
  5. 5.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 3 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  9. 9.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  10. 10.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 0.7 seconds?
  14. 14.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  15. 15.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ How many milliseconds is a wait of 3.9 seconds?
  20. 20.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  25. 25.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 8 seconds?
  30. 30.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?

Answer key

  1. 4200
  2. 1
  3. 40
  4. 8
  5. 2400
  6. 4800
  7. 6
  8. 15
  9. 0.25
  10. 1600
  11. 2800
  12. 1000
  13. 700
  14. pauses for half a second
  15. 800
  16. 700
  17. 1450
  18. 1000
  19. 3900
  20. 0.5
  21. 4400
  22. 1500
  23. 1.75
  24. 5
  25. 6.25
  26. 13000
  27. 1000
  28. 20
  29. 8
  30. 9.5
  31. 6
  32. 0.75
  33. 8.75
  34. 450
  35. 7.5
  36. 14000
  37. 1400
  38. 1000
  39. 1400
  40. 30

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