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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 240 · 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 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  4. 4.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  5. 5.⏱️ How many milliseconds is a wait of 2 seconds?
  6. 6.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  8. 8.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  13. 13.⏱️ How many milliseconds is a wait of 0.6 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 9 seconds?
  16. 16.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 5 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 1.8 seconds?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 3.2 seconds?
  22. 22.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  27. 27.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  30. 30.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 3 seconds?
  33. 33.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  38. 38.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  39. 39.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 2250 ms”. How many seconds is that? =

Answer key

  1. 2000
  2. 2800
  3. 24
  4. pauses for half a second
  5. 2000
  6. 8000
  7. 12
  8. 1600
  9. 1550
  10. 1500
  11. 7700
  12. 1000
  13. 600
  14. 8
  15. 9
  16. 9.5
  17. 5000
  18. 1100
  19. 1800
  20. 5700
  21. 3200
  22. 9
  23. 6
  24. 1400
  25. 950
  26. 20
  27. 10800
  28. 13600
  29. 40
  30. 0.5
  31. 8
  32. 3000
  33. 15200
  34. 600
  35. 1650
  36. 3000
  37. 40
  38. 4.5
  39. 7500
  40. 2.25

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