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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 373 · 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.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  2. 2.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  3. 3.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 16 seconds?
  6. 6.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  12. 12.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 1 second?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 0.2 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 4.7 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  25. 25.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 16 seconds?
  29. 29.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  30. 30.⏱️ How many milliseconds is a wait of 1.4 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 8 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  34. 34.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 12 seconds?
  36. 36.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  39. 39.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 2.9 seconds?

Answer key

  1. 1000
  2. 0.5
  3. 4000
  4. 900
  5. 40
  6. 2800
  7. pauses for half a second
  8. 12
  9. 100
  10. 1300
  11. 3
  12. 0.25
  13. 2
  14. 1800
  15. 1
  16. 16
  17. 1250
  18. 200
  19. 1200
  20. 4700
  21. 1050
  22. 20
  23. 15
  24. 45
  25. 5400
  26. 40
  27. 1450
  28. 8
  29. 2.75
  30. 1400
  31. 1400
  32. 16
  33. 6
  34. 4800
  35. 6
  36. 0.75
  37. 450
  38. 9
  39. 4200
  40. 2900

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