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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 89 · 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 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 1.4 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  4. 4.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 4 seconds?
  9. 9.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  10. 10.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 1.1 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 4 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 1.8 seconds?
  23. 23.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  28. 28.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 1.2 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 4.9 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 1 second?
  38. 38.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. 10
  2. 1400
  3. 1000
  4. 7.75
  5. 500
  6. 5000
  7. 12
  8. 4000
  9. pauses for half a second
  10. 7.5
  11. 8100
  12. 1100
  13. 1100
  14. 1600
  15. 3200
  16. 1.5
  17. 4
  18. 700
  19. 1500
  20. 1450
  21. 20
  22. 1800
  23. 6
  24. 3600
  25. 6400
  26. 500
  27. 32
  28. 9600
  29. 6.5
  30. 4000
  31. 1200
  32. 4900
  33. 900
  34. 800
  35. 40
  36. 1
  37. 2
  38. 4.25
  39. 600
  40. 6000

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