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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 258 · 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 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  2. 2.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  4. 4.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  6. 6.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 18 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 4 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 2.9 seconds?
  14. 14.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 2.7 seconds?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 700 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 250 ms }
    How many times does the LED blink in 5 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 0.5 seconds?
  24. 24.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  26. 26.⏱️ How many milliseconds is a wait of 4.8 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 1 second?
  34. 34.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 16 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.3 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.3 seconds?
  39. 39.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 45
  2. 2000
  3. 20
  4. 3400
  5. pauses for half a second
  6. 45
  7. 650
  8. 5500
  9. 1250
  10. 11900
  11. 15
  12. 4000
  13. 2900
  14. 1000
  15. 5
  16. 2700
  17. 4400
  18. 10
  19. 1700
  20. 8.5
  21. 16
  22. 1.75
  23. 500
  24. 2.25
  25. 5
  26. 4800
  27. 25
  28. 800
  29. 7
  30. 2.75
  31. 1000
  32. 1
  33. 1
  34. 8
  35. 40
  36. 4300
  37. 2
  38. 2300
  39. 6
  40. 1300

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