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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 67 · 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) 100 (b) 1000 (c) 60 (d) 10
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds is a wait of 2 seconds?
  4. 4.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 2 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 1.3 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 1.7 seconds?
  12. 12.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 3.4 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4.1 seconds?
  17. 17.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  18. 18.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ How many milliseconds is a wait of 1.1 seconds?
  31. 31.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 2.4 seconds?
  35. 35.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  37. 37.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  39. 39.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 1.6 seconds?

Answer key

  1. 1000
  2. 450
  3. 2000
  4. 1200
  5. 5
  6. 4800
  7. 15
  8. 4
  9. 1300
  10. 36
  11. 1700
  12. 3.5
  13. 0.5
  14. 3400
  15. 35
  16. 4100
  17. pauses for half a second
  18. 8.5
  19. 4800
  20. 1450
  21. 10400
  22. 16
  23. 1750
  24. 5.5
  25. 6
  26. 20
  27. 1400
  28. 1050
  29. 1400
  30. 1100
  31. 4000
  32. 6.75
  33. 5
  34. 2400
  35. 5
  36. 15
  37. 7700
  38. 14
  39. 7
  40. 1600

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