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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 530 · 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 1000 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  3. 3.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 20 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  10. 10.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 3.2 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 3.6 seconds?
  18. 18.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 7 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 4.9 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 0.7 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ How many milliseconds is a wait of 0.9 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ How many milliseconds is a wait of 2.7 seconds?
  27. 27.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  30. 30.⏱️ How many milliseconds is a wait of 3.4 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 2.3 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3.5 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?

Answer key

  1. 1650
  2. 1000
  3. 5200
  4. pauses for half a second
  5. 5
  6. 10
  7. 650
  8. 5
  9. 40
  10. 3000
  11. 3200
  12. 10
  13. 8.75
  14. 9
  15. 500
  16. 3
  17. 3600
  18. 5.5
  19. 14
  20. 4900
  21. 700
  22. 700
  23. 900
  24. 750
  25. 1350
  26. 2700
  27. 4
  28. 7800
  29. 2
  30. 3400
  31. 2300
  32. 350
  33. 3
  34. 7.5
  35. 10
  36. 9900
  37. 1.75
  38. 2
  39. 3500
  40. 1

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