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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 805 · 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 are in 1 second? (a) 1000 (b) 60 (c) 10 (d) 100
  2. 2.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  3. 3.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  5. 5.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 3 seconds?
  8. 8.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  9. 9.⏱️ How many milliseconds is a wait of 0.8 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 4.9 seconds?
  11. 11.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  12. 12.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 3.8 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 4.1 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 4 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 3.1 seconds?
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 3.4 seconds?
  26. 26.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 4.7 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 2 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 0.9 seconds?

Answer key

  1. 1000
  2. 0.5
  3. 4500
  4. 0.25
  5. 4000
  6. 40
  7. 3000
  8. pauses for half a second
  9. 800
  10. 4900
  11. 4.25
  12. 2600
  13. 3800
  14. 1
  15. 1500
  16. 45
  17. 4100
  18. 20
  19. 2
  20. 3100
  21. 6400
  22. 3300
  23. 8.25
  24. 9900
  25. 3400
  26. 4.5
  27. 1100
  28. 3.5
  29. 5400
  30. 1050
  31. 1100
  32. 2.5
  33. 300
  34. 4000
  35. 8400
  36. 1150
  37. 4200
  38. 4700
  39. 2000
  40. 900

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