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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 771 · 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 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  3. 3.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 4.6 seconds?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  10. 10.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  11. 11.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  12. 12.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  13. 13.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ How many milliseconds is a wait of 2 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 3.3 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 5 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 1050 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 16 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  33. 33.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 3.1 seconds?
  35. 35.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ How many milliseconds is a wait of 2.8 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 0.8 seconds?

Answer key

  1. 40
  2. 20
  3. 9.25
  4. 350
  5. 1650
  6. 28
  7. 500
  8. 4600
  9. 1000
  10. 10
  11. 4.25
  12. pauses for half a second
  13. 1300
  14. 2000
  15. 1000
  16. 1500
  17. 3300
  18. 20
  19. 1000
  20. 800
  21. 9
  22. 4000
  23. 5000
  24. 1200
  25. 500
  26. 8
  27. 1200
  28. 1200
  29. 900
  30. 900
  31. 50
  32. 12
  33. 3
  34. 3100
  35. 7200
  36. 2800
  37. 1700
  38. 13500
  39. 450
  40. 800

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