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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 485 · 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 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  8. 8.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 2.8 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 18 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 2.2 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 6 seconds?
  15. 15.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  16. 16.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 16 seconds?
  20. 20.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 1.5 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  36. 36.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 0.7 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.4 seconds?
  39. 39.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?

Answer key

  1. 3
  2. 15
  3. 1000
  4. 900
  5. 600
  6. 9600
  7. pauses for half a second
  8. 4.5
  9. 2800
  10. 4
  11. 45
  12. 2200
  13. 1100
  14. 3
  15. 1000
  16. 3
  17. 300
  18. 1500
  19. 40
  20. 8800
  21. 1500
  22. 200
  23. 1050
  24. 4
  25. 800
  26. 750
  27. 850
  28. 1.25
  29. 9
  30. 3500
  31. 2000
  32. 40
  33. 1150
  34. 2
  35. 35
  36. 7
  37. 700
  38. 2400
  39. 6000
  40. 25

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