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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 404 · 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) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  2. 2.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  4. 4.⏱️ How many milliseconds is a wait of 1.8 seconds?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  6. 6.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  10. 10.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 1.7 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 1.2 seconds?
  17. 17.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 0.4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 7 seconds?
  31. 31.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 2.2 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 1.9 seconds?
  34. 34.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  37. 37.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 2500 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 0.75
  3. 1
  4. 1800
  5. 1000
  6. 5000
  7. 6400
  8. 3.25
  9. 4.5
  10. 4500
  11. 1700
  12. 650
  13. 750
  14. 30
  15. 4900
  16. 1200
  17. 3200
  18. 1350
  19. 1100
  20. 2100
  21. 6
  22. 3000
  23. 1.5
  24. 400
  25. 600
  26. 6.25
  27. 1350
  28. 450
  29. 1250
  30. 7
  31. 3
  32. 2200
  33. 1900
  34. 10000
  35. 350
  36. 4
  37. 4.25
  38. 1200
  39. 3000
  40. 2.5

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