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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 458 · 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 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 1 second?
  2. 2.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 12 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 3.4 seconds?
  5. 5.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  7. 7.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  8. 8.⏱️ How many milliseconds is a wait of 3.8 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  10. 10.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  13. 13.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 4.5 seconds?
  17. 17.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 0.9 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 4.3 seconds?
  26. 26.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 2.7 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ How many milliseconds is a wait of 4.7 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 16 seconds?

Answer key

  1. 2
  2. 9
  3. 30
  4. 3400
  5. pauses for half a second
  6. 1000
  7. 2
  8. 3800
  9. 15
  10. 6.75
  11. 6600
  12. 40
  13. 18000
  14. 1
  15. 950
  16. 4500
  17. 3.5
  18. 5500
  19. 45
  20. 3500
  21. 4.25
  22. 9.25
  23. 850
  24. 900
  25. 4300
  26. 13500
  27. 8.5
  28. 1350
  29. 10000
  30. 6.5
  31. 20
  32. 2700
  33. 36
  34. 1450
  35. 13000
  36. 4700
  37. 3
  38. 20
  39. 20
  40. 8

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