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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 262 · 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) blinks 500 times (b) turns the LED off (c) waits 500 seconds (d) pauses for half a second
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 60 (d) 10
  5. 5.⏱️ How many milliseconds is a wait of 4.7 seconds?
  6. 6.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  9. 9.⏱️ How many milliseconds is a wait of 2.6 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 3.8 seconds?
  11. 11.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 12 seconds?
  14. 14.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 4.6 seconds?
  20. 20.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1050 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  24. 24.⏱️ How many milliseconds is a wait of 1.8 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  26. 26.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 16 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 3 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 9 seconds?
  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.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?

Answer key

  1. pauses for half a second
  2. 950
  3. 3.5
  4. 1000
  5. 4700
  6. 10200
  7. 1250
  8. 2
  9. 2600
  10. 3800
  11. 1.75
  12. 24
  13. 30
  14. 4.5
  15. 10000
  16. 8
  17. 650
  18. 7.5
  19. 4600
  20. 4400
  21. 1
  22. 1.25
  23. 2
  24. 1800
  25. 25
  26. 9.25
  27. 3500
  28. 1600
  29. 7
  30. 40
  31. 35
  32. 18
  33. 8
  34. 10
  35. 3000
  36. 32
  37. 18
  38. 12
  39. 500
  40. 20

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