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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 71 · 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 4.9 seconds?
  2. 2.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds is a wait of 2.3 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 4.3 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ How many milliseconds is a wait of 3.1 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 12 seconds?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  11. 11.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 1.3 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 1 second?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  15. 15.⏱️ 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
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 0.7 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 2.6 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 1 second?
  20. 20.⏱️ How many milliseconds is a wait of 0.5 seconds?
  21. 21.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 1.2 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  28. 28.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 0.4 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 6250 ms”. How many seconds is that? =

Answer key

  1. 4900
  2. 3900
  3. 4000
  4. 2300
  5. 4300
  6. 500
  7. 3100
  8. 30
  9. 1000
  10. 12
  11. 3900
  12. 1300
  13. 1
  14. 12
  15. pauses for half a second
  16. 25
  17. 700
  18. 2600
  19. 1
  20. 500
  21. 9.25
  22. 7.75
  23. 400
  24. 1200
  25. 1550
  26. 12600
  27. 10
  28. 3600
  29. 900
  30. 1
  31. 650
  32. 9600
  33. 1050
  34. 15
  35. 4800
  36. 350
  37. 400
  38. 900
  39. 450
  40. 6.25

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