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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 686 · 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 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  3. 3.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds is a wait of 1.5 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 18 seconds?
  7. 7.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 1.8 seconds?
  10. 10.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 9 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 0.9 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  15. 15.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 4.3 seconds?
  17. 17.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) pauses for half a second (d) blinks 500 times
  18. 18.⏱️ How many milliseconds is a wait of 2.1 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 14 seconds?
  20. 20.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  25. 25.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 3.6 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 4.9 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 1150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 20 seconds?

Answer key

  1. 8
  2. 1000
  3. 5500
  4. 1500
  5. 40
  6. 45
  7. 4200
  8. 350
  9. 1800
  10. 1.75
  11. 1800
  12. 18
  13. 900
  14. 40
  15. 3000
  16. 4300
  17. pauses for half a second
  18. 2100
  19. 7
  20. 2400
  21. 1100
  22. 6400
  23. 900
  24. 8.25
  25. 1200
  26. 3600
  27. 1800
  28. 1
  29. 0.75
  30. 4200
  31. 30
  32. 5
  33. 2.5
  34. 9.25
  35. 2
  36. 1600
  37. 4900
  38. 1150
  39. 1550
  40. 10

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