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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 2 · 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.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 60 (d) 100
  2. 2.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 0.8 seconds?
  4. 4.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 12 seconds?
  6. 6.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  9. 9.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 0.7 seconds?
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 4.7 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 2.5 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 5 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ How many milliseconds is a wait of 3.6 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 12 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 2.8 seconds?
  34. 34.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 1.1 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  39. 39.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1000
  2. 3.25
  3. 800
  4. 1.75
  5. 6
  6. 6.5
  7. 3
  8. 5
  9. 1500
  10. 1200
  11. 1100
  12. 50
  13. 700
  14. 4400
  15. 7200
  16. 4700
  17. 1250
  18. pauses for half a second
  19. 9600
  20. 1300
  21. 800
  22. 2500
  23. 10
  24. 1050
  25. 1
  26. 16
  27. 1150
  28. 1
  29. 3600
  30. 650
  31. 30
  32. 900
  33. 2800
  34. 6.75
  35. 1650
  36. 1600
  37. 1100
  38. 8
  39. 7.75
  40. 500

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