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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 72 · 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) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  2. 2.⏱️ How many milliseconds is a wait of 2.9 seconds?
  3. 3.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  12. 12.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 2.3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  16. 16.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 5 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 4.5 seconds?
  24. 24.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  25. 25.⏱️ How many milliseconds is a wait of 2.7 seconds?
  26. 26.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 1.2 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 1.4 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 2 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 4.4 seconds?
  32. 32.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 1.3 seconds?
  39. 39.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 2900
  3. 5.5
  4. 4.25
  5. 1050
  6. 1200
  7. 6.25
  8. 3.75
  9. 450
  10. 7
  11. 1000
  12. 7.5
  13. 20
  14. 2300
  15. 10
  16. 2200
  17. 1500
  18. 350
  19. 4500
  20. 1000
  21. 500
  22. 5000
  23. 4500
  24. 3
  25. 2700
  26. 8000
  27. 1800
  28. 1200
  29. 1400
  30. 1
  31. 4400
  32. 9000
  33. 5
  34. 0.75
  35. 2
  36. 32
  37. 3600
  38. 1300
  39. 2600
  40. 700

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