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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 103 · 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 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 8 seconds?
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) turns the LED off (d) waits 500 seconds
  8. 8.⏱️ How many milliseconds is a wait of 3.5 seconds?
  9. 9.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 2.4 seconds?
  23. 23.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 4.5 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  28. 28.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  37. 37.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 250 ms”. How many seconds is that? =

Answer key

  1. 16
  2. 8000
  3. 5100
  4. 1100
  5. 1.25
  6. 6
  7. pauses for half a second
  8. 3500
  9. 8.5
  10. 450
  11. 6.25
  12. 500
  13. 1250
  14. 7500
  15. 9000
  16. 9.5
  17. 1650
  18. 1000
  19. 3000
  20. 10
  21. 750
  22. 2400
  23. 8.25
  24. 4500
  25. 850
  26. 6
  27. 10
  28. 10200
  29. 7.25
  30. 36
  31. 2000
  32. 3
  33. 45
  34. 50
  35. 900
  36. 18
  37. 12000
  38. 850
  39. 900
  40. 0.25

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