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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 945 · 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 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 16 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  6. 6.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds is a wait of 2.8 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  13. 13.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds is a wait of 4.4 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 2.4 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 2.5 seconds?
  21. 21.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) waits 500 seconds (d) blinks 500 times
  22. 22.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 3.1 seconds?
  24. 24.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 0.2 seconds?
  27. 27.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  29. 29.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  40. 40.⏱️ A program says “wait 9750 ms”. How many seconds is that? =

Answer key

  1. 8
  2. 15
  3. 350
  4. 10
  5. 5
  6. 6.25
  7. 5400
  8. 2800
  9. 1100
  10. 7000
  11. 2400
  12. 35
  13. 4500
  14. 4.25
  15. 10
  16. 4400
  17. 2400
  18. 28
  19. 15
  20. 2500
  21. pauses for half a second
  22. 10
  23. 3100
  24. 8
  25. 32
  26. 200
  27. 4.75
  28. 1000
  29. 2.25
  30. 700
  31. 1450
  32. 3500
  33. 1150
  34. 9.25
  35. 900
  36. 850
  37. 35
  38. 3000
  39. 5
  40. 9.75

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