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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 847 · 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.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 4.2 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 4.5 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 4.6 seconds?
  6. 6.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  11. 11.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  12. 12.⏱️ loop forever { LED ON; wait 1350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 0.7 seconds?
  14. 14.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  19. 19.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 1.3 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 1.2 seconds?
  23. 23.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 7 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 0.2 seconds?
  26. 26.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 1 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3.5 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 4.9 seconds?

Answer key

  1. 2400
  2. 24
  3. 4200
  4. 4500
  5. 4600
  6. 8.75
  7. 35
  8. 1050
  9. 800
  10. 1000
  11. pauses for half a second
  12. 5
  13. 700
  14. 8100
  15. 1450
  16. 400
  17. 1650
  18. 20
  19. 9.75
  20. 1150
  21. 1300
  22. 1200
  23. 2.5
  24. 7
  25. 200
  26. 2000
  27. 300
  28. 4.75
  29. 3.5
  30. 1750
  31. 12
  32. 1000
  33. 6
  34. 15
  35. 1000
  36. 11000
  37. 40
  38. 2000
  39. 3500
  40. 4900

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