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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 442 · 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 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ How many milliseconds is a wait of 0.6 seconds?
  4. 4.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds is a wait of 3.4 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds is a wait of 3.8 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 4.6 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 2.9 seconds?
  17. 17.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 0.1 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  24. 24.⏱️ How many milliseconds is a wait of 1.5 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 14 seconds?
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 2 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 1.4 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 4 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 1.3 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 6 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 850
  2. 9500
  3. 600
  4. 1.75
  5. 20
  6. 1050
  7. 1000
  8. 5600
  9. 3400
  10. 50
  11. 1600
  12. 3800
  13. 20
  14. 4600
  15. 4
  16. 2900
  17. pauses for half a second
  18. 550
  19. 8800
  20. 5.75
  21. 700
  22. 100
  23. 4
  24. 1500
  25. 7
  26. 1800
  27. 2
  28. 700
  29. 1400
  30. 4000
  31. 1300
  32. 1
  33. 4.75
  34. 950
  35. 4800
  36. 10
  37. 12
  38. 12
  39. 650
  40. 1850

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