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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 29 · 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.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  2. 2.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  4. 4.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 1.9 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 2 seconds?
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 3.9 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 3.8 seconds?
  17. 17.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 1.6 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 16 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 4.6 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  35. 35.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ How many milliseconds is a wait of 0.4 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 1.1 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  39. 39.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?

Answer key

  1. 1000
  2. pauses for half a second
  3. 50
  4. 1
  5. 6
  6. 1900
  7. 40
  8. 1250
  9. 2000
  10. 9000
  11. 1600
  12. 5600
  13. 30
  14. 950
  15. 3900
  16. 3800
  17. 3400
  18. 400
  19. 1600
  20. 36
  21. 40
  22. 16
  23. 1100
  24. 4600
  25. 450
  26. 10400
  27. 7.25
  28. 7000
  29. 9.25
  30. 5
  31. 5100
  32. 4
  33. 1850
  34. 45
  35. 3500
  36. 400
  37. 1100
  38. 12
  39. 8
  40. 16

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