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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 433 · 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.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  5. 5.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  7. 7.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  8. 8.⏱️ How many milliseconds is a wait of 1.5 seconds?
  9. 9.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4.6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 3.2 seconds?
  25. 25.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 20 seconds?
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ How many milliseconds is a wait of 0.4 seconds?
  33. 33.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 300
  2. 8.75
  3. 3.25
  4. 1000
  5. 1550
  6. 3.75
  7. pauses for half a second
  8. 1500
  9. 5600
  10. 1050
  11. 4000
  12. 4.25
  13. 6500
  14. 5600
  15. 45
  16. 4600
  17. 350
  18. 3600
  19. 850
  20. 4
  21. 500
  22. 9
  23. 1
  24. 3200
  25. 7.75
  26. 1700
  27. 1450
  28. 10
  29. 3300
  30. 600
  31. 1300
  32. 400
  33. 10
  34. 850
  35. 15000
  36. 1800
  37. 950
  38. 1800
  39. 1350
  40. 850

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