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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 573 · 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 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  2. 2.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) waits 500 seconds (d) blinks 500 times
  3. 3.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ How many milliseconds is a wait of 2.6 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds is a wait of 3.6 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 4 seconds?
  13. 13.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  14. 14.⏱️ How many milliseconds is a wait of 2 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  16. 16.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 0.6 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 2.3 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 1.1 seconds?
  27. 27.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ How many milliseconds is a wait of 0.5 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 4 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  40. 40.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. 15
  2. pauses for half a second
  3. 1150
  4. 800
  5. 2600
  6. 600
  7. 8
  8. 5.75
  9. 1550
  10. 3600
  11. 2
  12. 4000
  13. 1000
  14. 2000
  15. 24
  16. 3000
  17. 750
  18. 1100
  19. 2.5
  20. 250
  21. 4500
  22. 25
  23. 1200
  24. 600
  25. 2300
  26. 1100
  27. 11200
  28. 6
  29. 1150
  30. 7000
  31. 1100
  32. 500
  33. 1500
  34. 850
  35. 24
  36. 550
  37. 5100
  38. 2
  39. 2
  40. 2700

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