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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 781 · 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.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 18 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 1550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  4. 4.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  5. 5.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 10 (d) 100
  7. 7.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  8. 8.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many times does the LED blink in 14 seconds?
  11. 11.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 14 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  24. 24.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ How many milliseconds is a wait of 1.3 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 0.6 seconds?
  32. 32.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 2.9 seconds?
  38. 38.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?

Answer key

  1. 3
  2. 45
  3. 1
  4. 9.5
  5. 5600
  6. 1000
  7. pauses for half a second
  8. 5
  9. 25
  10. 7
  11. 7200
  12. 2
  13. 8
  14. 8
  15. 4000
  16. 950
  17. 1
  18. 3800
  19. 700
  20. 10500
  21. 4
  22. 35
  23. 10
  24. 4200
  25. 9000
  26. 1600
  27. 1300
  28. 1450
  29. 900
  30. 5500
  31. 600
  32. 12000
  33. 1750
  34. 400
  35. 6600
  36. 750
  37. 2900
  38. 2400
  39. 1200
  40. 45

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