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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 603 · 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.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds is a wait of 1.9 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  4. 4.⏱️ How many milliseconds is a wait of 3.3 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 16 seconds?
  6. 6.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 2.5 seconds?
  11. 11.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 0.4 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  15. 15.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 18 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ How many milliseconds is a wait of 3.1 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  26. 26.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  30. 30.⏱️ How many milliseconds is a wait of 3.4 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 14 seconds?
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 4 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  37. 37.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 8500 ms”. How many seconds is that? =

Answer key

  1. 2
  2. 1900
  3. 1000
  4. 3300
  5. 40
  6. 12800
  7. 30
  8. 1250
  9. 4.75
  10. 2500
  11. 13600
  12. 400
  13. 1000
  14. pauses for half a second
  15. 8400
  16. 0.75
  17. 9
  18. 800
  19. 8
  20. 1.75
  21. 700
  22. 8
  23. 2100
  24. 3100
  25. 1
  26. 3.5
  27. 8000
  28. 5.5
  29. 1.25
  30. 3400
  31. 35
  32. 11400
  33. 2
  34. 1250
  35. 16200
  36. 3
  37. 7
  38. 12
  39. 3000
  40. 8.5

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