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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 347 · 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) 100 (b) 1000 (c) 10 (d) 60
  2. 2.⏱️ How many milliseconds is a wait of 1.3 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 7 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  5. 5.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ 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
  10. 10.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 1.8 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1450 ms }
    How many times does the LED blink in 18 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 7 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 14 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 4.7 seconds?
  20. 20.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 1.5 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 20 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 1.7 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 9 seconds?
  32. 32.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 14 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 8 seconds?
  40. 40.⏱️ A program says “wait 6500 ms”. How many seconds is that? =

Answer key

  1. 1000
  2. 1300
  3. 14
  4. 40
  5. 15000
  6. 4.25
  7. 16
  8. 1600
  9. pauses for half a second
  10. 15000
  11. 1800
  12. 9
  13. 7
  14. 35
  15. 850
  16. 9
  17. 450
  18. 0.25
  19. 4700
  20. 3.5
  21. 15
  22. 30
  23. 1500
  24. 1200
  25. 0.75
  26. 1350
  27. 50
  28. 2
  29. 1700
  30. 25
  31. 18
  32. 8.75
  33. 9.25
  34. 850
  35. 0.5
  36. 1100
  37. 7200
  38. 7
  39. 8
  40. 6.5

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