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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 818 · 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 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  2. 2.⏱️ How many milliseconds is a wait of 3.1 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 4.8 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  5. 5.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  6. 6.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) blinks 500 times (d) waits 500 seconds
  9. 9.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  11. 11.⏱️ How many milliseconds is a wait of 2.2 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  14. 14.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ How many milliseconds is a wait of 1.7 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 2.7 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 18 seconds?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 1.2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 18 seconds?
  34. 34.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ How many milliseconds is a wait of 1.6 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.2 seconds?
  37. 37.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 1 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 2
  2. 3100
  3. 4800
  4. 1000
  5. 1.5
  6. 12000
  7. 6600
  8. pauses for half a second
  9. 1.25
  10. 2
  11. 2200
  12. 1200
  13. 9.75
  14. 10400
  15. 1700
  16. 10
  17. 2700
  18. 30
  19. 32
  20. 5
  21. 8
  22. 4.75
  23. 1150
  24. 45
  25. 2000
  26. 800
  27. 850
  28. 1250
  29. 2.75
  30. 700
  31. 1200
  32. 950
  33. 45
  34. 8000
  35. 1600
  36. 4200
  37. 0.5
  38. 20
  39. 1000
  40. 250

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