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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 514 · 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) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  2. 2.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 60 (d) 100
  5. 5.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 0.9 seconds?
  9. 9.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 4.4 seconds?
  12. 12.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 2.2 seconds?
  15. 15.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1200 ms }
    How many times does the LED blink in 12 seconds?
  18. 18.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 1400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 2 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 0.1 seconds?
  21. 21.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ How many milliseconds is a wait of 1.5 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 0.5 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 4 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 0.7 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 1.3 seconds?
  36. 36.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 0.8 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?

Answer key

  1. pauses for half a second
  2. 950
  3. 9
  4. 1000
  5. 2.75
  6. 900
  7. 4
  8. 900
  9. 4.5
  10. 25
  11. 4400
  12. 3.5
  13. 1600
  14. 2200
  15. 4.75
  16. 750
  17. 6
  18. 2700
  19. 1
  20. 100
  21. 10000
  22. 900
  23. 10000
  24. 1500
  25. 20
  26. 500
  27. 2
  28. 1200
  29. 5.25
  30. 9600
  31. 3500
  32. 35
  33. 700
  34. 1350
  35. 1300
  36. 3600
  37. 5.75
  38. 800
  39. 3000
  40. 20

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