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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 318 · 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.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  2. 2.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  4. 4.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 4.6 seconds?
  10. 10.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 3.2 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 1.8 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 1.3 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 0.5 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  19. 19.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 14 seconds?
  24. 24.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ How many milliseconds is a wait of 2.9 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 6 seconds?
  28. 28.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 5 seconds?
  30. 30.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  33. 33.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 0.9 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 3.6 seconds?
  37. 37.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 2.2 seconds?

Answer key

  1. pauses for half a second
  2. 10
  3. 1000
  4. 3600
  5. 2000
  6. 25
  7. 700
  8. 5
  9. 4600
  10. 2400
  11. 2100
  12. 3200
  13. 1800
  14. 400
  15. 1300
  16. 500
  17. 7000
  18. 35
  19. 3.75
  20. 7700
  21. 3600
  22. 1.25
  23. 7
  24. 10800
  25. 1050
  26. 2900
  27. 6
  28. 0.25
  29. 5000
  30. 2.25
  31. 3.5
  32. 28
  33. 3600
  34. 900
  35. 1000
  36. 3600
  37. 1
  38. 5
  39. 4
  40. 2200

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