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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 303 · 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 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 60 (d) 100
  3. 3.⏱️ How many milliseconds is a wait of 4.1 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 2 seconds?
  5. 5.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 4 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 2.9 seconds?
  9. 9.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  10. 10.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds is a wait of 4.8 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  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 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  18. 18.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 4.9 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 4.2 seconds?
  23. 23.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 2 seconds?
  26. 26.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 1.8 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 3.1 seconds?
  32. 32.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 1.1 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 16 seconds?
  36. 36.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?

Answer key

  1. 2
  2. 1000
  3. 4100
  4. 2
  5. 3.25
  6. 4
  7. 450
  8. 2900
  9. pauses for half a second
  10. 700
  11. 4800
  12. 12
  13. 2200
  14. 9.25
  15. 800
  16. 15
  17. 5
  18. 2
  19. 850
  20. 1000
  21. 4900
  22. 4200
  23. 5.25
  24. 100
  25. 1
  26. 6
  27. 28
  28. 10000
  29. 8
  30. 1800
  31. 3100
  32. 3.5
  33. 1100
  34. 1250
  35. 40
  36. 8.25
  37. 1050
  38. 5000
  39. 6000
  40. 10

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