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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 512 · 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 14 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  3. 3.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds is a wait of 2.7 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds is a wait of 4.8 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 2.3 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 20 seconds?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  17. 17.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  21. 21.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  22. 22.⏱️ How many milliseconds is a wait of 1.1 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 1650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  27. 27.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 4 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 4.5 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 4.6 seconds?
  31. 31.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 18 seconds?
  34. 34.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  35. 35.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 8 seconds?

Answer key

  1. 35
  2. 30
  3. 0.75
  4. 2700
  5. 500
  6. 1350
  7. 4800
  8. 4800
  9. 1800
  10. 5000
  11. 2800
  12. 2300
  13. 10
  14. 10
  15. 10500
  16. 10
  17. 1.75
  18. 3000
  19. 6000
  20. pauses for half a second
  21. 1000
  22. 1100
  23. 8
  24. 16
  25. 8
  26. 40
  27. 7.5
  28. 4000
  29. 4500
  30. 4600
  31. 3200
  32. 4
  33. 45
  34. 2
  35. 13500
  36. 850
  37. 45
  38. 1200
  39. 7
  40. 8

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