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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 736 · 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 150 ms }
    How many times does the LED blink in 1 second?
  2. 2.⏱️ 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
  3. 3.⏱️ How many milliseconds is a wait of 2 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  5. 5.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ How many milliseconds is a wait of 0.7 seconds?
  7. 7.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  9. 9.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 4 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 3 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  14. 14.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 14 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 2.1 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 4.9 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 4.5 seconds?
  24. 24.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 3.5 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ How many milliseconds is a wait of 1.8 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 0.5 seconds?
  34. 34.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 4 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 0.3 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 2.6 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.3 seconds?
  39. 39.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 12 seconds?

Answer key

  1. 4
  2. pauses for half a second
  3. 2000
  4. 1000
  5. 4200
  6. 700
  7. 9800
  8. 15
  9. 1.5
  10. 4000
  11. 3000
  12. 150
  13. 15
  14. 1
  15. 35
  16. 2
  17. 12
  18. 1800
  19. 2100
  20. 1050
  21. 6.75
  22. 4900
  23. 4500
  24. 2700
  25. 3500
  26. 1050
  27. 2400
  28. 950
  29. 750
  30. 5000
  31. 1050
  32. 1800
  33. 500
  34. 7.5
  35. 2
  36. 300
  37. 2600
  38. 2300
  39. 8.5
  40. 30

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