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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 235 · 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.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  5. 5.⏱️ 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
  6. 6.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ How many milliseconds is a wait of 3.5 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 10 seconds?
  9. 9.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  13. 13.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 3.6 seconds?
  15. 15.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 1.9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  31. 31.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 3.9 seconds?
  34. 34.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 8 seconds?
  38. 38.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 550 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 10 seconds?

Answer key

  1. 4000
  2. 16
  3. 800
  4. 2
  5. pauses for half a second
  6. 1200
  7. 3500
  8. 10
  9. 6.25
  10. 16
  11. 24
  12. 1000
  13. 5
  14. 3600
  15. 1.75
  16. 20
  17. 500
  18. 1900
  19. 36
  20. 3.5
  21. 12600
  22. 3200
  23. 6600
  24. 1700
  25. 1300
  26. 1500
  27. 7000
  28. 350
  29. 850
  30. 25
  31. 9600
  32. 9100
  33. 3900
  34. 6500
  35. 13000
  36. 6400
  37. 20
  38. 4800
  39. 1300
  40. 50

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