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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 952 · 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 is a wait of 4.1 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 3.8 seconds?
  4. 4.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 1150 ms }
    How many times does the LED blink in 14 seconds?
  6. 6.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 12 seconds?
  16. 16.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 1.2 seconds?
  18. 18.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 4.3 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  22. 22.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 2.7 seconds?
  32. 32.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  35. 35.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 10 seconds?
  36. 36.⏱️ repeat 6 times { buzzer ON; wait 200 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 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 1.5 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 0.8 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?

Answer key

  1. 4100
  2. 8
  3. 3800
  4. 1.25
  5. 7
  6. 3200
  7. pauses for half a second
  8. 2000
  9. 4
  10. 1000
  11. 32
  12. 7.75
  13. 0.75
  14. 1050
  15. 30
  16. 2400
  17. 1200
  18. 10000
  19. 1500
  20. 4300
  21. 28
  22. 7.5
  23. 3
  24. 600
  25. 4500
  26. 9.5
  27. 1350
  28. 4800
  29. 800
  30. 1200
  31. 2700
  32. 2.75
  33. 4000
  34. 5
  35. 5
  36. 4200
  37. 1000
  38. 1500
  39. 800
  40. 5

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