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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 633 · 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.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 5 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 0.5 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 1 seconds?
  9. 9.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 12 seconds?
  12. 12.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  14. 14.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 4 seconds?
  16. 16.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 16 seconds?
  19. 19.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  27. 27.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  33. 33.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  38. 38.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1000
  2. 7200
  3. 10
  4. 25
  5. 400
  6. 500
  7. 950
  8. 1000
  9. 2800
  10. 3200
  11. 30
  12. 6.5
  13. 5
  14. 300
  15. 4
  16. 4.25
  17. 7.25
  18. 8
  19. 16200
  20. 5
  21. 1300
  22. 40
  23. 4000
  24. 5.25
  25. 15
  26. 35
  27. 0.75
  28. 1250
  29. 50
  30. 550
  31. 150
  32. pauses for half a second
  33. 9900
  34. 6
  35. 2.25
  36. 8.25
  37. 30
  38. 13300
  39. 3.5
  40. 550

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