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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 520 · 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 100 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 1550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 20 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  7. 7.⏱️ How many milliseconds is a wait of 1.7 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  9. 9.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  11. 11.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  19. 19.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 12 seconds?
  21. 21.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ How many milliseconds is a wait of 2.9 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 3.9 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 18 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 16 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 1.4 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 9 seconds?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 2.5 seconds?
  40. 40.⏱️ A program says “wait 750 ms”. How many seconds is that? =

Answer key

  1. 450
  2. 2000
  3. 10
  4. 12
  5. 1650
  6. 4
  7. 1700
  8. 20
  9. 10800
  10. 1000
  11. 2.25
  12. 800
  13. 1400
  14. 250
  15. 1800
  16. 300
  17. 750
  18. 16
  19. pauses for half a second
  20. 30
  21. 7.75
  22. 1500
  23. 2900
  24. 950
  25. 3900
  26. 45
  27. 2600
  28. 1100
  29. 40
  30. 1250
  31. 1400
  32. 1250
  33. 750
  34. 600
  35. 2400
  36. 900
  37. 18
  38. 6500
  39. 2500
  40. 0.75

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