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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 382 · 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.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  10. 10.⏱️ How many milliseconds is a wait of 1.6 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 1.1 seconds?
  12. 12.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  14. 14.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 0.6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 10 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 18 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 16 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 3.6 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 4.3 seconds?
  25. 25.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  27. 27.⏱️ How many milliseconds is a wait of 0.4 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 1.7 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 1.2 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 20 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 4.2 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 1550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 6 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 8
  2. 8800
  3. 35
  4. 1550
  5. 1000
  6. 850
  7. 1250
  8. pauses for half a second
  9. 1000
  10. 1600
  11. 1100
  12. 1
  13. 28
  14. 4.75
  15. 30
  16. 600
  17. 10
  18. 45
  19. 40
  20. 3600
  21. 1300
  22. 10
  23. 1450
  24. 4300
  25. 7000
  26. 2
  27. 400
  28. 1700
  29. 1200
  30. 10
  31. 1600
  32. 9.75
  33. 450
  34. 11000
  35. 400
  36. 7.75
  37. 1000
  38. 4200
  39. 3
  40. 1250

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