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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 37 · 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.⏱️ 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
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  3. 3.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 20 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  17. 17.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 1.9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  25. 25.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 3.7 seconds?
  30. 30.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  35. 35.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ How many milliseconds is a wait of 5 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 4.9 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 3.5 seconds?
  39. 39.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 7000 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 1000
  3. 5600
  4. 9000
  5. 1100
  6. 14000
  7. 50
  8. 450
  9. 1050
  10. 12
  11. 28
  12. 6400
  13. 8
  14. 20
  15. 1150
  16. 7.25
  17. 6600
  18. 300
  19. 1900
  20. 1500
  21. 2
  22. 9.75
  23. 6.5
  24. 3
  25. 6800
  26. 2400
  27. 700
  28. 1100
  29. 3700
  30. 9
  31. 4500
  32. 4200
  33. 5.75
  34. 2
  35. 11400
  36. 5000
  37. 4900
  38. 3500
  39. 10400
  40. 7

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