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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 312 · 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.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  4. 4.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  6. 6.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  9. 9.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  10. 10.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  14. 14.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  16. 16.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 4.1 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 0.7 seconds?
  24. 24.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  25. 25.⏱️ How many milliseconds is a wait of 1.6 seconds?
  26. 26.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 6 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 1 second?
  34. 34.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  40. 40.⏱️ A program says “wait 750 ms”. How many seconds is that? =

Answer key

  1. 14000
  2. 1000
  3. 10
  4. 6000
  5. 15
  6. 4
  7. 950
  8. pauses for half a second
  9. 5
  10. 4.75
  11. 8
  12. 40
  13. 40
  14. 10400
  15. 4.25
  16. 5500
  17. 4100
  18. 1850
  19. 3.75
  20. 6000
  21. 7.75
  22. 8100
  23. 700
  24. 3.5
  25. 1600
  26. 5.5
  27. 8100
  28. 8
  29. 1800
  30. 5
  31. 5600
  32. 3
  33. 1
  34. 1500
  35. 1
  36. 20
  37. 900
  38. 0.25
  39. 25
  40. 0.75

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