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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 251 · 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.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  4. 4.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  10. 10.⏱️ How many milliseconds is a wait of 0.8 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 2.4 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  16. 16.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  19. 19.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 2.7 seconds?
  22. 22.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  26. 26.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 1 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 2.8 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 3.4 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 3.1 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 3.3 seconds?

Answer key

  1. 4500
  2. 1000
  3. pauses for half a second
  4. 950
  5. 1100
  6. 5600
  7. 9
  8. 650
  9. 1000
  10. 800
  11. 1350
  12. 7.25
  13. 2400
  14. 20
  15. 8
  16. 2
  17. 1800
  18. 14
  19. 2400
  20. 28
  21. 2700
  22. 11000
  23. 1550
  24. 8000
  25. 16
  26. 9000
  27. 0.25
  28. 2700
  29. 3.75
  30. 150
  31. 2.25
  32. 9000
  33. 1000
  34. 2800
  35. 3400
  36. 3100
  37. 10
  38. 8400
  39. 1.75
  40. 3300

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