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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 631 · 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 1350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  5. 5.⏱️ How many milliseconds is a wait of 3.5 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 12 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  9. 9.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  10. 10.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  12. 12.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 0.6 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4.7 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 0.4 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 18 seconds?
  24. 24.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 3.3 seconds?
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 3.1 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1
  2. 550
  3. 1550
  4. 6.75
  5. 3500
  6. 6
  7. 5
  8. 1000
  9. pauses for half a second
  10. 1200
  11. 3.25
  12. 5000
  13. 2
  14. 8
  15. 600
  16. 4700
  17. 1600
  18. 3200
  19. 5500
  20. 1550
  21. 400
  22. 32
  23. 45
  24. 9.25
  25. 1700
  26. 12600
  27. 2.75
  28. 5000
  29. 9000
  30. 3300
  31. 4200
  32. 0.25
  33. 1200
  34. 6000
  35. 12000
  36. 1500
  37. 8
  38. 1800
  39. 3100
  40. 1150

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