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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 480 · 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 1400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  3. 3.⏱️ 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
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  5. 5.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  12. 12.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ How many milliseconds is a wait of 0.9 seconds?
  15. 15.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds is a wait of 1.8 seconds?
  17. 17.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 3.1 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 0.2 seconds?
  27. 27.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 0.7 seconds?
  33. 33.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  34. 34.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  37. 37.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 1.9 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3.5 seconds?
  40. 40.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1
  2. 5.75
  3. pauses for half a second
  4. 28
  5. 1800
  6. 3.5
  7. 650
  8. 950
  9. 1150
  10. 50
  11. 1000
  12. 15
  13. 500
  14. 900
  15. 0.75
  16. 1800
  17. 1800
  18. 15
  19. 1700
  20. 7
  21. 2100
  22. 1450
  23. 2.5
  24. 600
  25. 3100
  26. 200
  27. 4.25
  28. 4000
  29. 600
  30. 1000
  31. 0.25
  32. 700
  33. 6
  34. 4900
  35. 4
  36. 8.25
  37. 12000
  38. 1900
  39. 3500
  40. 9600

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