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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 413 · 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 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 8 seconds?
  4. 4.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  6. 6.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  8. 8.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds is a wait of 1.9 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 4.3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 16 seconds?
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 4.6 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 9 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ How many milliseconds is a wait of 3.2 seconds?
  30. 30.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  33. 33.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 4.1 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 0.6 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ How many milliseconds is a wait of 3.6 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 2 seconds?

Answer key

  1. 20
  2. 1250
  3. 4
  4. 9100
  5. pauses for half a second
  6. 550
  7. 1000
  8. 2
  9. 950
  10. 1900
  11. 3
  12. 600
  13. 25
  14. 4300
  15. 8
  16. 7700
  17. 15300
  18. 6000
  19. 50
  20. 600
  21. 36
  22. 1150
  23. 650
  24. 1800
  25. 20
  26. 4600
  27. 18
  28. 5
  29. 3200
  30. 4
  31. 8400
  32. 5
  33. 3.5
  34. 4100
  35. 750
  36. 7
  37. 600
  38. 400
  39. 3600
  40. 2000

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