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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 395 · 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.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  3. 3.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 3 seconds?
  5. 5.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  6. 6.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  8. 8.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds is a wait of 4.4 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 3.2 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 0.4 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 1.4 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 1.3 seconds?
  20. 20.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 4.1 seconds?
  22. 22.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 2 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ How many milliseconds is a wait of 2.5 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 2.3 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 3.8 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 0.3 seconds?

Answer key

  1. pauses for half a second
  2. 1000
  3. 9900
  4. 6
  5. 9.75
  6. 3
  7. 5
  8. 5.25
  9. 800
  10. 4400
  11. 3200
  12. 400
  13. 1250
  14. 2
  15. 1150
  16. 13500
  17. 16
  18. 1400
  19. 1300
  20. 3.5
  21. 4100
  22. 7000
  23. 4
  24. 20
  25. 2000
  26. 350
  27. 2500
  28. 2300
  29. 300
  30. 10
  31. 9.5
  32. 40
  33. 20
  34. 750
  35. 3800
  36. 1000
  37. 1.25
  38. 500
  39. 4000
  40. 300

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