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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 789 · 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 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  3. 3.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) waits 500 seconds (d) pauses for half a second
  4. 4.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  7. 7.⏱️ How many milliseconds is a wait of 0.7 seconds?
  8. 8.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  9. 9.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ How many milliseconds is a wait of 4 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 1 seconds?
  12. 12.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ How many milliseconds is a wait of 0.9 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ How many milliseconds is a wait of 0.8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 4.2 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 2.8 seconds?
  22. 22.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 0.3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 0.1 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 14 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 1.6 seconds?
  30. 30.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?

Answer key

  1. 10
  2. 8.25
  3. pauses for half a second
  4. 8400
  5. 900
  6. 1
  7. 700
  8. 0.25
  9. 600
  10. 4000
  11. 1000
  12. 2.25
  13. 1000
  14. 4800
  15. 900
  16. 1750
  17. 800
  18. 1550
  19. 28
  20. 4200
  21. 2800
  22. 3500
  23. 300
  24. 8
  25. 300
  26. 8.75
  27. 100
  28. 35
  29. 1600
  30. 5.5
  31. 3000
  32. 7
  33. 6
  34. 950
  35. 0.5
  36. 300
  37. 6.25
  38. 11900
  39. 150
  40. 4

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