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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 919 · 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 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  5. 5.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  6. 6.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 6 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 4.2 seconds?
  18. 18.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ How many milliseconds is a wait of 1.9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  25. 25.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  26. 26.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ How many milliseconds is a wait of 0.2 seconds?
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  31. 31.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 6 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 14 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?

Answer key

  1. 16000
  2. 300
  3. 5500
  4. 1
  5. pauses for half a second
  6. 2
  7. 2000
  8. 12
  9. 1800
  10. 10
  11. 1900
  12. 7700
  13. 8400
  14. 3900
  15. 2
  16. 9100
  17. 4200
  18. 2400
  19. 1900
  20. 15
  21. 1300
  22. 1050
  23. 2700
  24. 25
  25. 1000
  26. 9000
  27. 2400
  28. 200
  29. 5700
  30. 20
  31. 3000
  32. 1.25
  33. 8100
  34. 1000
  35. 6
  36. 35
  37. 550
  38. 3000
  39. 25
  40. 15

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