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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 853 · 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 1 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  3. 3.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds is a wait of 2.4 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 1.4 seconds?
  6. 6.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  7. 7.⏱️ 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
  8. 8.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 20 seconds?
  10. 10.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds is a wait of 4.5 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  17. 17.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 0.8 seconds?
  19. 19.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  25. 25.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 0.7 seconds?
  30. 30.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  33. 33.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 3 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 12 seconds?

Answer key

  1. 1000
  2. 8
  3. 9.75
  4. 2400
  5. 1400
  6. 7.5
  7. pauses for half a second
  8. 5.25
  9. 50
  10. 8400
  11. 1250
  12. 4500
  13. 1600
  14. 700
  15. 6
  16. 18
  17. 6.25
  18. 800
  19. 5600
  20. 4000
  21. 1000
  22. 3000
  23. 10
  24. 6
  25. 9.5
  26. 2400
  27. 850
  28. 2800
  29. 700
  30. 3
  31. 1850
  32. 45
  33. 8.75
  34. 3000
  35. 4
  36. 1500
  37. 35
  38. 1050
  39. 9
  40. 6

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