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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 392 · 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 850 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds is a wait of 0.4 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 2 seconds?
  5. 5.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  6. 6.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 20 seconds?
  13. 13.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  15. 15.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) blinks 500 times (d) waits 500 seconds
  16. 16.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  17. 17.⏱️ How many milliseconds is a wait of 3.8 seconds?
  18. 18.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 2.1 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 2.7 seconds?
  28. 28.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ How many milliseconds is a wait of 3.4 seconds?
  35. 35.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 18 seconds?
  37. 37.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1150
  2. 950
  3. 400
  4. 1
  5. 1
  6. 8.25
  7. 8000
  8. 9.75
  9. 20
  10. 1000
  11. 800
  12. 50
  13. 2700
  14. 3.25
  15. pauses for half a second
  16. 1000
  17. 3800
  18. 6300
  19. 45
  20. 5
  21. 2100
  22. 200
  23. 0.25
  24. 550
  25. 900
  26. 5.75
  27. 2700
  28. 3000
  29. 20
  30. 1300
  31. 3.5
  32. 1400
  33. 1150
  34. 3400
  35. 2700
  36. 45
  37. 9000
  38. 7000
  39. 1400
  40. 3300

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