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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 585 · 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 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 12 seconds?
  2. 2.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 1.4 seconds?
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds is a wait of 4.6 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 5 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  12. 12.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  13. 13.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 4.9 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 14 seconds?
  17. 17.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  21. 21.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ How many milliseconds is a wait of 1.7 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 5 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  25. 25.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  26. 26.⏱️ How many milliseconds is a wait of 3.6 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 0.1 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 4.7 seconds?

Answer key

  1. 6
  2. 5200
  3. 750
  4. 750
  5. 3.75
  6. 8
  7. 1400
  8. 2100
  9. 4600
  10. 5
  11. 1000
  12. pauses for half a second
  13. 1150
  14. 1100
  15. 4900
  16. 7
  17. 5600
  18. 2.5
  19. 3200
  20. 6
  21. 10200
  22. 1700
  23. 5000
  24. 35
  25. 7.75
  26. 3600
  27. 800
  28. 250
  29. 3
  30. 1050
  31. 8000
  32. 9000
  33. 2.75
  34. 1700
  35. 2
  36. 1300
  37. 100
  38. 50
  39. 8.75
  40. 4700

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