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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 733 · 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.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  5. 5.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  7. 7.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  10. 10.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  12. 12.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ How many milliseconds is a wait of 2.2 seconds?
  15. 15.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds is a wait of 4.2 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  27. 27.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  29. 29.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 2 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 2.9 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 10 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 2.8 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.5 seconds?
  39. 39.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 0.5 seconds?

Answer key

  1. 9.5
  2. 10
  3. 1100
  4. 5
  5. pauses for half a second
  6. 1000
  7. 5000
  8. 2
  9. 2.5
  10. 0.75
  11. 8
  12. 8.75
  13. 700
  14. 2200
  15. 7.75
  16. 4200
  17. 5500
  18. 300
  19. 9
  20. 1600
  21. 5100
  22. 900
  23. 1200
  24. 4000
  25. 1.25
  26. 5
  27. 3600
  28. 45
  29. 6400
  30. 2
  31. 150
  32. 1800
  33. 2900
  34. 3
  35. 5200
  36. 5
  37. 2800
  38. 2500
  39. 4000
  40. 500

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