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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 157 · 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 250 ms }
    How many times does the LED blink in 20 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  3. 3.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  7. 7.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 2.7 seconds?
  13. 13.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 0.5 seconds?
  16. 16.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  27. 27.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 1.6 seconds?
  29. 29.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  35. 35.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  39. 39.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?

Answer key

  1. 50
  2. 1000
  3. 2
  4. 4.25
  5. 1000
  6. pauses for half a second
  7. 1550
  8. 2400
  9. 5700
  10. 900
  11. 2200
  12. 2700
  13. 5000
  14. 1300
  15. 500
  16. 3
  17. 7.25
  18. 1100
  19. 15
  20. 850
  21. 1
  22. 1800
  23. 3.25
  24. 8
  25. 850
  26. 5.5
  27. 1.75
  28. 1600
  29. 1800
  30. 2400
  31. 35
  32. 1050
  33. 650
  34. 5.25
  35. 7000
  36. 8000
  37. 700
  38. 0.5
  39. 3.75
  40. 32

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