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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 897 · 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 3.6 seconds?
  2. 2.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ 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
  5. 5.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 2.4 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 0.2 seconds?
  8. 8.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 0.6 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds is a wait of 1.3 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 1.9 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 0.7 seconds?
  24. 24.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ How many milliseconds is a wait of 1 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 0.1 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  31. 31.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 1 second?
  32. 32.⏱️ How many milliseconds is a wait of 4.5 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  35. 35.⏱️ How many milliseconds is a wait of 4.9 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 8 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 3600
  2. 1.5
  3. 600
  4. pauses for half a second
  5. 7
  6. 2400
  7. 200
  8. 4
  9. 600
  10. 1800
  11. 1300
  12. 4
  13. 1050
  14. 3000
  15. 12000
  16. 2.25
  17. 6.25
  18. 2100
  19. 0.25
  20. 3000
  21. 250
  22. 1900
  23. 700
  24. 1000
  25. 750
  26. 2000
  27. 9500
  28. 1000
  29. 100
  30. 1
  31. 1
  32. 4500
  33. 1150
  34. 4.25
  35. 4900
  36. 1600
  37. 3000
  38. 8
  39. 30
  40. 1150

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