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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 741 · 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 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 1 second?
  2. 2.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  3. 3.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  4. 4.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  6. 6.⏱️ How many milliseconds is a wait of 4.2 seconds?
  7. 7.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 3.5 seconds?
  9. 9.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  12. 12.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 7 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4.8 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 3.4 seconds?
  19. 19.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 5 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 0.9 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 3.3 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  33. 33.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  34. 34.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 3.2 seconds?
  39. 39.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 2 seconds?

Answer key

  1. 1
  2. 5
  3. pauses for half a second
  4. 500
  5. 1000
  6. 4200
  7. 1.25
  8. 3500
  9. 2.75
  10. 750
  11. 7.75
  12. 6
  13. 1300
  14. 14
  15. 4800
  16. 20
  17. 5.5
  18. 3400
  19. 2.5
  20. 7700
  21. 5
  22. 900
  23. 750
  24. 950
  25. 1700
  26. 0.75
  27. 450
  28. 1
  29. 3300
  30. 1450
  31. 10
  32. 35
  33. 9.75
  34. 12000
  35. 300
  36. 10000
  37. 36
  38. 3200
  39. 5.75
  40. 2000

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