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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 785 · 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 650 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  6. 6.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  9. 9.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ How many milliseconds is a wait of 1.4 seconds?
  16. 16.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  18. 18.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  23. 23.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 4.9 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 7 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  31. 31.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 0.3 seconds?
  35. 35.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  36. 36.⏱️ How many milliseconds is a wait of 0.9 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1650
  2. 3.5
  3. 1100
  4. 10800
  5. pauses for half a second
  6. 1600
  7. 1200
  8. 1000
  9. 1250
  10. 20
  11. 8000
  12. 0.5
  13. 6000
  14. 5600
  15. 1400
  16. 1.75
  17. 6
  18. 10
  19. 4800
  20. 9.5
  21. 4
  22. 20
  23. 6.5
  24. 4900
  25. 7
  26. 7
  27. 50
  28. 8.5
  29. 0.75
  30. 45
  31. 2.75
  32. 300
  33. 2400
  34. 300
  35. 9.25
  36. 900
  37. 1350
  38. 12
  39. 5
  40. 5500

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