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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 85 · 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 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 6 seconds?
  2. 2.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  8. 8.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) turns the LED off (d) waits 500 seconds
  9. 9.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 100 (d) 60
  12. 12.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 3.6 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  16. 16.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 2.2 seconds?
  20. 20.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 1.1 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 1150 ms }
    How many times does the LED blink in 2 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 4.6 seconds?
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  37. 37.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 1250 ms”. How many seconds is that? =

Answer key

  1. 3
  2. 13500
  3. 16
  4. 1100
  5. 1150
  6. 16
  7. 4
  8. pauses for half a second
  9. 12800
  10. 6800
  11. 1000
  12. 1250
  13. 11700
  14. 3600
  15. 5
  16. 2.5
  17. 800
  18. 10
  19. 2200
  20. 4500
  21. 8
  22. 0.25
  23. 750
  24. 350
  25. 1100
  26. 1
  27. 800
  28. 950
  29. 4600
  30. 4000
  31. 9.5
  32. 8
  33. 3000
  34. 1350
  35. 2000
  36. 5.5
  37. 6300
  38. 15000
  39. 500
  40. 1.25

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