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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 390 · 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 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 2.8 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 12 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 0.7 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  9. 9.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 1.4 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 7 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4.4 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  19. 19.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 8 seconds?
  23. 23.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 3.1 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 16 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  32. 32.⏱️ How many milliseconds is a wait of 2.1 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 2.5 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  39. 39.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 4
  2. 36
  3. 2800
  4. 6
  5. 700
  6. 20
  7. 15
  8. 15
  9. pauses for half a second
  10. 1000
  11. 30
  12. 1400
  13. 7
  14. 8
  15. 4400
  16. 1750
  17. 1.5
  18. 28
  19. 6000
  20. 8
  21. 2400
  22. 4
  23. 8.5
  24. 3100
  25. 1750
  26. 1000
  27. 20
  28. 2.25
  29. 7200
  30. 40
  31. 2
  32. 2100
  33. 2500
  34. 8
  35. 800
  36. 750
  37. 800
  38. 3
  39. 9.5
  40. 1450

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