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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 648 · 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.⏱️ How many milliseconds is a wait of 0.8 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 0.4 seconds?
  3. 3.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  7. 7.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds is a wait of 1.8 seconds?
  9. 9.⏱️ 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
  10. 10.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 2.7 seconds?
  12. 12.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 1.5 seconds?
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 4 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 4.4 seconds?
  18. 18.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 3.6 seconds?
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 4.2 seconds?
  26. 26.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 5 seconds?
  28. 28.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 1.4 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  31. 31.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 9 seconds?
  35. 35.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  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.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 20 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 3 seconds?

Answer key

  1. 800
  2. 400
  3. 5.5
  4. 1600
  5. 1150
  6. 1000
  7. 2700
  8. 1800
  9. pauses for half a second
  10. 3300
  11. 2700
  12. 3.75
  13. 1500
  14. 6000
  15. 1050
  16. 4
  17. 4400
  18. 12600
  19. 1800
  20. 1500
  21. 600
  22. 3600
  23. 5500
  24. 45
  25. 4200
  26. 1.75
  27. 5000
  28. 9000
  29. 1400
  30. 10
  31. 8.75
  32. 3200
  33. 1050
  34. 9
  35. 1
  36. 900
  37. 0.5
  38. 1350
  39. 10
  40. 3

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