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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 402 · 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.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  3. 3.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  4. 4.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 0.1 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  10. 10.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 2 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 1.6 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  17. 17.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 1.1 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 5 seconds?
  32. 32.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 0.8 seconds?
  34. 34.⏱️ 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
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 12 seconds?
  36. 36.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 3.5 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  40. 40.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. 8.75
  2. 1000
  3. 2
  4. 3600
  5. 5
  6. 8
  7. 1550
  8. 100
  9. 10
  10. 7200
  11. 1
  12. 800
  13. 9.25
  14. 1600
  15. 800
  16. 7
  17. 6.5
  18. 2600
  19. 8
  20. 4800
  21. 1200
  22. 32
  23. 1100
  24. 1150
  25. 9.5
  26. 20
  27. 8.5
  28. 3.75
  29. 6
  30. 1100
  31. 5000
  32. 9000
  33. 800
  34. pauses for half a second
  35. 30
  36. 3000
  37. 8.25
  38. 3500
  39. 20
  40. 600

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