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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 245 · 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 600 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  3. 3.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  5. 5.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds is a wait of 0.3 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  8. 8.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds is a wait of 4.2 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds is a wait of 0.4 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 2 seconds?
  13. 13.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 16 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 2 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 1.4 seconds?
  21. 21.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  25. 25.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  27. 27.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 16 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 0.9 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 4.9 seconds?
  33. 33.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.7 seconds?
  37. 37.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 12 seconds?
  39. 39.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 2500 ms”. How many seconds is that? =

Answer key

  1. 750
  2. pauses for half a second
  3. 0.25
  4. 1000
  5. 6.5
  6. 300
  7. 10
  8. 5000
  9. 4200
  10. 1000
  11. 400
  12. 2
  13. 1.5
  14. 6.25
  15. 8
  16. 8
  17. 1300
  18. 8
  19. 1
  20. 1400
  21. 7.5
  22. 4
  23. 900
  24. 12
  25. 8.5
  26. 15
  27. 3000
  28. 40
  29. 1400
  30. 800
  31. 900
  32. 4900
  33. 13000
  34. 9.25
  35. 4
  36. 4700
  37. 10
  38. 6
  39. 9600
  40. 2.5

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