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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 966 · 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 300 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 100 (d) 60
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 5 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 1.3 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  7. 7.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  9. 9.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 0.1 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1450 ms }
    How many times does the LED blink in 8 seconds?
  17. 17.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 2.1 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 0.2 seconds?
  21. 21.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ How many milliseconds is a wait of 0.8 seconds?
  23. 23.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 20 seconds?
  28. 28.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?

Answer key

  1. 800
  2. 9000
  3. 1000
  4. 5
  5. 1300
  6. 8
  7. 7
  8. 6.25
  9. 3600
  10. 2400
  11. 14400
  12. 600
  13. 100
  14. 8
  15. 8.25
  16. 4
  17. pauses for half a second
  18. 450
  19. 2100
  20. 200
  21. 11000
  22. 800
  23. 0.25
  24. 400
  25. 12600
  26. 2.25
  27. 50
  28. 5.75
  29. 1800
  30. 17000
  31. 2800
  32. 750
  33. 4400
  34. 8800
  35. 12600
  36. 800
  37. 3900
  38. 2700
  39. 2.5
  40. 3

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