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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 641 · 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) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  2. 2.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  4. 4.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  7. 7.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  18. 18.⏱️ How many milliseconds is a wait of 4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  21. 21.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 4.2 seconds?
  35. 35.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ How many milliseconds is a wait of 4.3 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 1.2 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 1400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 20 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 2.2 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?

Answer key

  1. pauses for half a second
  2. 8.75
  3. 25
  4. 2000
  5. 6.5
  6. 1000
  7. 6.25
  8. 3600
  9. 1350
  10. 13500
  11. 2.75
  12. 1400
  13. 550
  14. 1800
  15. 24
  16. 6300
  17. 5
  18. 4000
  19. 15
  20. 5
  21. 3.75
  22. 5400
  23. 1450
  24. 1050
  25. 9900
  26. 16
  27. 3.25
  28. 2000
  29. 800
  30. 1100
  31. 6
  32. 6.75
  33. 1500
  34. 4200
  35. 1600
  36. 4300
  37. 1200
  38. 10
  39. 2200
  40. 25

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