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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 929 · 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 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  2. 2.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ How many milliseconds is a wait of 2.5 seconds?
  8. 8.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) blinks 500 times (d) waits 500 seconds
  10. 10.⏱️ How many milliseconds is a wait of 2.8 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 3.4 seconds?
  15. 15.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds is a wait of 4.9 seconds?
  17. 17.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 1.3 seconds?
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 3.9 seconds?
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 2.4 seconds?
  27. 27.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 4.8 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  30. 30.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 1.7 seconds?

Answer key

  1. 4
  2. 5000
  3. 9.25
  4. 17000
  5. 24
  6. 650
  7. 2500
  8. 1200
  9. pauses for half a second
  10. 2800
  11. 30
  12. 1500
  13. 15
  14. 3400
  15. 6.5
  16. 4900
  17. 2.75
  18. 1300
  19. 1600
  20. 3900
  21. 6800
  22. 7200
  23. 8.5
  24. 1000
  25. 36
  26. 2400
  27. 5
  28. 4800
  29. 35
  30. 1.5
  31. 4800
  32. 1000
  33. 1300
  34. 1000
  35. 2400
  36. 11000
  37. 900
  38. 1800
  39. 1800
  40. 1700

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