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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 602 · 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 7250 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ 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
  4. 4.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  6. 6.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds is a wait of 3 seconds?
  9. 9.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  10. 10.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 6 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 4.4 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 8 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 3.4 seconds?
  27. 27.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 18 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 1 second?
  35. 35.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 1750 ms”. How many seconds is that? =

Answer key

  1. 7.25
  2. 1050
  3. pauses for half a second
  4. 1850
  5. 1000
  6. 12000
  7. 3200
  8. 3000
  9. 1
  10. 9
  11. 12
  12. 850
  13. 4000
  14. 1750
  15. 14400
  16. 5200
  17. 1800
  18. 4
  19. 2200
  20. 4400
  21. 4
  22. 950
  23. 6500
  24. 1150
  25. 12
  26. 3400
  27. 1.25
  28. 2
  29. 45
  30. 12
  31. 10
  32. 6
  33. 9600
  34. 1
  35. 1200
  36. 20
  37. 950
  38. 600
  39. 8.75
  40. 1.75

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