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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 564 · 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.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds is a wait of 1.3 seconds?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  6. 6.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  7. 7.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 20 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  10. 10.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 0.9 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 2.8 seconds?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 4.8 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ How many milliseconds is a wait of 4.5 seconds?
  19. 19.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 4.6 seconds?
  21. 21.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 2.2 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 8 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 4.7 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  30. 30.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ How many milliseconds is a wait of 3.1 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ How many milliseconds is a wait of 4.2 seconds?
  35. 35.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  39. 39.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 3.2 seconds?

Answer key

  1. 45
  2. 700
  3. 1300
  4. 1300
  5. 1000
  6. pauses for half a second
  7. 1600
  8. 10
  9. 20
  10. 5.5
  11. 16
  12. 900
  13. 2800
  14. 1200
  15. 9000
  16. 4800
  17. 3500
  18. 4500
  19. 9.25
  20. 4600
  21. 0.5
  22. 0.75
  23. 9900
  24. 950
  25. 45
  26. 2200
  27. 4
  28. 4700
  29. 24
  30. 9000
  31. 600
  32. 3100
  33. 950
  34. 4200
  35. 1.5
  36. 1300
  37. 6
  38. 32
  39. 3.5
  40. 3200

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