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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 935 · 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.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 2.7 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  6. 6.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds is a wait of 1.6 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 1 seconds?
  11. 11.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  17. 17.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  19. 19.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  22. 22.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 12 seconds?
  32. 32.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 0.1 seconds?
  39. 39.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1200
  2. 1
  3. 2700
  4. 1000
  5. 35
  6. 5700
  7. 7200
  8. 1600
  9. 4
  10. 1000
  11. 9.5
  12. 1850
  13. 6600
  14. 6000
  15. 650
  16. pauses for half a second
  17. 1.25
  18. 25
  19. 4000
  20. 6.25
  21. 2
  22. 1100
  23. 700
  24. 6
  25. 2.5
  26. 2.25
  27. 1250
  28. 650
  29. 650
  30. 3.5
  31. 30
  32. 11700
  33. 6400
  34. 1550
  35. 9800
  36. 2
  37. 300
  38. 100
  39. 5600
  40. 17000

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