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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 502 · 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 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 3 seconds?
  2. 2.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  5. 5.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  7. 7.⏱️ How many milliseconds is a wait of 1 seconds?
  8. 8.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 0.5 seconds?
  11. 11.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 18 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  15. 15.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 2.8 seconds?
  21. 21.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  27. 27.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 4.6 seconds?
  29. 29.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 1.3 seconds?
  31. 31.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  34. 34.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ How many milliseconds is a wait of 4 seconds?
  36. 36.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 2 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 4.1 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 3
  2. 7500
  3. 1650
  4. 1000
  5. 1050
  6. pauses for half a second
  7. 1000
  8. 9000
  9. 8.5
  10. 500
  11. 2.75
  12. 1600
  13. 45
  14. 20
  15. 8.25
  16. 650
  17. 40
  18. 700
  19. 9
  20. 2800
  21. 10000
  22. 150
  23. 5600
  24. 1100
  25. 7000
  26. 3.25
  27. 1.5
  28. 4600
  29. 6300
  30. 1300
  31. 2100
  32. 5.25
  33. 36
  34. 1200
  35. 4000
  36. 8800
  37. 2.5
  38. 1
  39. 4100
  40. 1800

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