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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 126 · 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 400 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  7. 7.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 100 (d) 60
  9. 9.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  11. 11.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  12. 12.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 4 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 4.6 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ How many milliseconds is a wait of 4.9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 1.8 seconds?
  24. 24.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 0.7 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 1.7 seconds?
  27. 27.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  30. 30.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 3.1 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ How many milliseconds is a wait of 1.2 seconds?
  36. 36.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 1.3 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?

Answer key

  1. 500
  2. 2800
  3. 4.75
  4. 800
  5. 1350
  6. pauses for half a second
  7. 750
  8. 1000
  9. 6
  10. 1
  11. 9.75
  12. 10800
  13. 2
  14. 4600
  15. 1150
  16. 6.5
  17. 2000
  18. 4900
  19. 950
  20. 1800
  21. 6300
  22. 5
  23. 1800
  24. 8800
  25. 700
  26. 1700
  27. 7.5
  28. 4000
  29. 15
  30. 11000
  31. 3100
  32. 750
  33. 800
  34. 1800
  35. 1200
  36. 9800
  37. 4800
  38. 1300
  39. 1100
  40. 6800

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